I saw Olsen basically confirm this on the Daily Show a little bit back. I hope Taylor-Johnson comes at this with a different voice than he uses in Kick-Ass, that voice annoyed me so much and it doesn't fit Pietro. Here's hoping.
You know that he has a European accent, right? He'll probably use his accent for Pietro since QS is European.
I don't plan to ever watch AGENTS OF S.H.I.E.L.D. mainly because of the Coulson issue. I like the character, but any revival completely undermines one of the most important parts of THE AVENGERS for me. Liking the character is what made his death so impactful. It also perpetuates one of the things I hate the most in comics. Death has no meaning or consequence. I'm not going to rant on about this series. Just pretend it doesn't exist.
The show hints that the real Son of Coul is dead, while this AOS' Coulson is a LMD.