^^ "A pointless action scene role"? What? We don't even know how Singer is going to use him in the film. Also this is Singer so he's not just going to be using Pietro just because. This isn't the same Fox reigme as it was before since Tom Rothman departed.
Let's not talk about X3.
But in X2, Lady Deathstrike was completely wasted, with her entire history never being mentioned, and she was only there for a fight scene.
With the huge cast of characters already involved in DOFP, I have my doubts Quicksilver we get any development at all in this movie.