dark_b, I think that would've been a bold ending, and pretty dark ending for a sitcom...but IMO there had to be some sort of silver lining for Ted beyond just preaching some strange convoluted lesson to his kids (I was totally in love with your Aunt Robin for many years, it ruined many of my relationships, but if it wasn't for that I may not have met your mom...something something lifes twists and turns, something something enjoy the journey and don't worry about the destination. yeah ok.). If they didn't show him getting back with Robin I'd probably still assume that it was going to happen at some point, but I'd be annoyed with them for keeping it ambiguous.
And I don't know if I'd call Ted/Robin the status quo. The only season they actually dated was Season 2. Always wanted to see them get another shot. It's one of the main reasons I stayed interested in the story of the show. Sure, the big buildup to the reveal of the mother's identity was a hook of the show. I understand why that upsets people, but as a Ted/Robin fan I would've felt strung along too by stuff like Marshall/Lily's bet, Ted and Robin's "40 and single" bet, etc. If they wanted to kill that storyline, they should've just stopped even teasing the possibility, but they always threw a little fuel to the flame from time to time. So it would've been misleading people either way.
Anyhow, I feel like I've said my piece on the matter. I truly have no problem with anyone's opinions on the ending, and I've been on either side of a controversial debate enough times to know that some arguments can just go in circles forever. In truth I'm just using this thread as prep for the arguments I've been having with my friends in real life, haha.
At the end of the day, I still think it's odd and cool in a way that the ending to a sitcom stirred up so much controversy. Hasn't happened since Seinfeld, and probably not to this strong a degree.