Zalewski on RWB role doesn't seem adequate but I guess we have to find out. His crossing sucks tbh, but he's pretty good at striking spaces and taking on opponent.
His end product needs a massive improvement, but I woudn't mind to try him there. Darmian doesn't contribute much offensively either. But the thing is, having both Bisseck and Zalewski on the right flank, might be tactically suicidal. I'd go with Pavard - Zalewski, or Bisseck/Pavard and vice versa.
Either way, I have faith on Inzaghi's decisions. He's still doing utmost with what he's got.