Damn Dasher! I'm going to come back and read this later, but love the passion.
You're welcome. Don't forget to bookmark. I took what we know that we're going to get for Season 3 (Born Again and Gladiator) and added my ideas for Bullseye, Mary Walker and Buck Cashman since I don't feel like Will Simpson should be the only assassin that Kingpin has lying around in Born Again for 13 episodes and I'd like Season 3 to be a bit more villain focused and with Gao likely to change series to Iron Fist and Nobu, Owl and the Russians dead and Fisk needs a bigger supporting cast, particularly since Vanessa needs to be taken off the table for a good while and Mary can serve as Wilson's new love interest.
As far as characterizations go. Typhoid should be brutal but happy go lucky and seem like she doesn't think too much about hurting people since it's just what she does. She's often quite personable and even funny when not hurting people. She's capable of Love and really does care for Wilson and can't bear to see anything bad happen to him after he lost Vanessa. The Mary Walker persona should be shy and submissive which is everything that Typhoid isn't. She doesn't take risks or crack jokes and seems like she's scared by normal everyday things. She's not so much loyal as much as she gets attached to people because she wants them to take care of her. Ultimately, Typhoid is scared of Mary Walker until they merge into a new dominant personality.
Buck Cashman is an assassin but struggles with the morality of it. He also really doesn't want Lance to follow in his footsteps and wants to protect him. The doomsday shelter is mostly so Lance doesn't have to be exposed to anything that Buck brings home.
Larry is a very aggressive prosecutor for the DA. He ultimately detests vigilantes as much as he does criminals and says that the Avengers need to be behind bars, particularly Ant-Man and Hulk. He enjoys making criminals deeply afraid when he confronts them. He won't go bad this season but there's enough anger and malice in him and he's enough of a bully that you can see him as somebody who'll eventually become a villain.
Maya should be deaf so she won't talk but she'll write notes and use sign language. She's more of an obstacle than a villain since she believes that Matt killed her father instead of Fisk. Her backstory is touched on and shown in a flashback but since she's part of a whole (pun intended), we do see what makes her tick with the hope that she'll show up again with the Avengers or Defenders, possibly Moon Knight if that ever gets off the ground. I can't see her still appearing with Daredevil since she knows that Matt didn't kill her father but once she puts on the Ronin mask, she's driven to make sure that what happened to her doesn't happen to anyone else.
Eric Slaughter is a mob boss who is really only interested in winning. He doesn't know when to lay low and keeps trying to go out swinging. His whole worldview is that if he's going down, he should at least bring down others with him so that he isn't the only loser and that sets the stage for Born Again.
Carl Burbank is meant to just be a bad guy with a gun for an arm below his elbow. It doesn't really matter how he's portrayed since he's a minor character who exists to be eventually killed off. He's not all that interesting in the comics but he just has a gun for an arm so he seems like he's cool.
Bullseye's entire purpose revolves around Father Lantom's speech in Season 1 about how he began to believe in the devil. He has no redeeming values and lashes out at innocent people when he doesn't get his way. If Kingpin is, "a child and a monster" then Bullseye is an overgrown teenager who's just angry all the time. He's rude, he curses, he genuinely doesn't respect Fisk like Buck and Typhoid do and when the conversation changes to anything that isn't strictly business, he leaves the room. Literally the only thing keeping Bullseye loyal to Fisk is the fact that he's being paid. He enjoys killing. He enjoys torture. When he's in Fisk's office, he's busy doing things like sharpening pencils and inspecting scissors to see if they're rusted enough to use as a weapon because he's constantly looking for sharp objects to use as weapons so he's always a step away from killing anyone and everyone around him. I want him to have no redeeming values and just be the biggest jerk that anyone can imagine so whenever Daredevil beats him up, the audience cheers. If he comes across as in any way likable, I don't feel like it'll be Bullseye since his main defining characteristic is how mean and detestable he is.