They should’ve had Hank and Jan as prominent SHIELD scientists throughout A1 as Fury’s top advisors or whatnot. That way you could get involvement with the main cast, a significant history with Fury, Nat and Clint and even have Jan still coin the name.
Integrating Wright's Ant-Man vision the MCU that sprang up while he was off doing other stuff was always the sticking point by most reports.
I think Hank Pym was going to die in Wright's Ant-Man instead of just be wounded like he was in Reed's version. Douglas only had a one movie deal back when Marvel was handing out multi-picture deals to most of their leading hero and supporting cast actors.
I would've replaced Hawkeye with Wasp. There should've been a superpowered female member on the team. Black Widow is great, but she lacks any flashy powers. It doesn't help that the only other prominent female superhero at the time was Gamora, who also lacked any fun powers. I think Wasp would've gained a lot of popularity due to her pixie-like powerset. Little girls (and li'l gay boys like 7 year old me) would've loved her, especially if they went with Jan's fun-loving and sassy personality.
Instead, we got wet blanket Hope Pym.
Wasp could easily be any ethnicity. I think they made her Asian in the Ultimate universe? They could've gone that route or any other.
Not particularly. She lacks Janet's fun, charismatic charm. The Early MCU films had issues with women being the "serious mom" of the group. See: Gamora, Pepper Potts, Hope, Jane Foster, Maria Hill, even Black Widow.