Mangala, Fernando, Zaba, Sagna, Navas and Bony would all struggle IMO.
Nasri, Silva, Fernandinho, Sterling, Aguero, KDB and Otamendi would all thrive.
Zabaleta! what a joker, Guardiola loves attacking fullbacks, and zaba's play in and around the box makes him a definite RB option. Sagna on the otherhand, is in trouble unless he starts doing more in their half.
Navas would be fine. He'd do better even. Technically he is very good, his ball control, short passing etc. is better than most and he's played a big role in the tiki-taka Spanish team which basically slotted a few players around the existing Barcelona core.
Mangala could thrive, he's going to have a much better time when the entire 10 outfied players are part of the defense, and Pep makes sure the CB's get protection.
Importantly for both, Guardiola fills his players with confidence, which is what those two need more than anything.