I think the presence or absence of a set up for characters in other, recent movies is kind of part of the process of picking which characters are going to be in this particular film.

Obviously, if you look at the structure of the team as they've set it up through a series of films, there doesn't seem to be a spot for Wasp.

But that's the choice I'm talking about. They could have set it up differently.

And even then, I could easily see opportunities to insert her in a SHIELD or sponsor role that doesn't require her to be in the field, and thus doesn't require her to display complicated superpowers.