I know the stories.  I know the history, I've seen the episode.
It still doesn't change the fact that she has appeared in ONE out of continuity story. No matter how great it was, it doesn't compare to the YEARS of continuous publication and stories that Dick, Jason, and Tim have had....sorry. 
No matter how likable, spunky or fresh her character was, her impact in the comic book world, and in Batman's world, just doesn't compare to these characters who have survived DECADES in HUNDREDS of stories.
-R
		
		
	 
This is a matter of quality and influence over quantity and imitations. Batman: The Dark Knight Returns has been in continuous publication since  1986. That's 
YEARS, DECADES of reprints of that 
ONE story. The impact and influence of that 
ONE story on the comic book world, and on the  Batman franchise and superhero franchises, overshadows hundreds of other Batman stories and influences many as well. 
Batman: The Dark Knight Returns revolutionized comics. It redesigned the  graphic novel in comic book size with each issue being 48-pages, with  square binding, high quality paper stock, and watercolor painting. Dark Knight Returns introduced the Dark Knight format, later called the   "prestige format". It was also the first  to be collected into a TPB. It  brought Batman back closer to the way Bill Finger and Bob Kane created  him as a fierce vigilante wanted by the law. It even brought back the short bat-eared cowl and bat-emblem without the yellow oval, it went back to the black and grey look of the costume without all the blue. The heavy use of gadgets and bat-vehicles which had been toned way down in the Bronze Age.  The scope of it is huge.  Miller delves deeply into each characters soul and allows the reader a  unfiltered look into their thoughts. It makes use of an internal  monologue replacing the narrator in the story so the character's  thoughts and feelings are counterpoint to his actions. Characters cussing in a  Batman comic. A female Robin. The utility belt with functional pockets  instead of those little tubes. 
It's extremely influential. The votes to kill Jason Todd in A Death in the Family were obviously influenced by Jason Todd being dead in Dark Knight Returns. Frank Miller changed the way Alan Moore looked at Batman and the Joker,  influencing Alan Moore to create the Killing Joke. Grant Morrison said that Arkham Asylum "was intended as a critique of   the '80s interpretation of Batman as violent, driven and borderline   psychopathic." That '80s interpretation of Batman comes from Frank   Miller's Dark Knight Returns. So if there was no Batman: The Dark Knight   Returns, there would be no Batman: Arkham Asylum. Batman: The Killing  Joke, Batman: Arkham Asylum, Green Arrow: The Long  Bow Hunters, Batman:  The Cult, etc., wouldn't have existed. If Frank Miller's Dark Knight  Returns and Batman: Year One were never released  the state of Batman  comics would be stuck in the Bronze Age. Jeph   Loeb is an obvious Miller imitator. Long Halloween/Dark Victory are  obviously influenced by Miller's Batman: Year  One with Miller's  creation The Roman and his mafia family, Harvey Dent prior to becoming   Two-Face, Captain James Gordon, Selina Kyle showing up. And in Hush  -- a  trenchcoat-wearing face-bandaged Harvey Dent, a kiss with Selena, a   fight with Superman, almost-killing of the Joker . . . sound familiar?   That's Miller's Dark Knight Returns.  Dark Knight Returns introduced the most  mainstream  superheroes (Superman and Batman previously viewed by the  general  public as the most wholesome superheroes in Super Friends, the  Batman  TV show starring Adam West and the Superman movies starring  Christopher  Reeve) in a story with very adult themes, situations and language. 
In Batman Begins when he fell into the hole when he was a  kid and was frightened by the bats: That comes from Dark Knight Returns, which Denny O'Neil was influenced by to write The Man Who Falls story.  The Batmobile as a tank concept originates in Dark Knight Returns.  Batman using a spear gun originates in Dark Knight Returns.
Batman wearing body armor in the movies was also influenced by Dark  Knight Returns. 
Sam Hamm said in Comics Interview Super Special, "The first issue of  Dark Knight had just come out when I was first discussing the  screenplay. I went into the comics store to see what was going on in the  field then, and I was pretty staggered! There was every reason to get  excited. Dark Knight in the tone. Nightmarish Gotham City. There are a  couple of literal swipes from Dark Knight -- the notion that he wears  the emblem on his chest as a target, essentially, because he's trying to  draw fire away from his head. There are a couple of other bits like  that."
Danny Elfman said on the Batman special features DVD, "After I finished  Beetlejuice I got a call from Tim saying, 'I'm doing this thing you  might be interested in it.' He sent me the Dark Knight comics. That was  much more up my alley than what I had known of the original Batman  comics as a kid."
Micheal Keaton said on an A&E channel documentary, "Tim Burton was  really into the Frank Miller thing and knew it and understood it far  more than I did. He had the look of it and the tone of it."
 Tim Burton said in the book Burton on Burton "The success of those  graphic novels made our ideas more acceptable." 
Dark Knight Returns influenced Jim Lee to join the comic book world. 
"Back when I was in college from 1982 to 1986, I grew   bored and disenchanted with comics, barely perusing my subscriptions   when I went home for various holiday breaks. Frank Miller changed all   that in 1986 when the Dark Knight Returns blew my mind and lit up my   retinas.
I haven't been the same since.
My passion for creating comics comes from this one book and I've   embarrassed Frank countless times by repeating this exact same story to   him. Being fortunate enough to have as passionate fans, I know how it   feels to be told similar tales so I hold back and try and act normal   around him now so I don't freak him out. But he is ****ing Frank Miller,   man."
http://www.comicbookresources.com/?page=article&id=4436
Jubilee and the Stephenie Brown Robin and Hit-Girl were obviously influenced by Carrie Kelley.  
		
		
	
	
In 2007 Geoff Johns even planned to have Carrie Kelley herself in the Booster Gold series, "This book is time and space, and space includes the Multiverse," explained Johns, Earth-31 is the Dark Knight Universe, and Dan Jurgens featured her on the original version of the cover. 
But it was changed and she didn't appear in the series because Frank Miller didn't approve. Frank Miller said "I would rather they didn't because I love the character, so I feel very territorial about her." 
Alex Ross had an obvious homage to Carrie Kelley in Kingdom Come.
Dark Knight Returns certainly influenced Kingdom Come. Kingdom Come is the Dark Knight Returns for Superman - Superman retiring and then returning to fighting crime years later older with grey hair and crime has gotten really bad and Superman influencing others to fight crime and trying to teach the younger generation, just as the Dark Knight Returns Batman had with the Sons of Batman gang. 
Even Adam Hughes has done a tribute to Carrie Kelley.
Carrie Kelley and the Dark Knight Returns story which she appears in have certainly had a huge impact and influence. She's the most influential Robin since Dick Grayson started the side-kick craze in 1940.