The team would be way better right now with Nylander rather than Pesce. Pesce is great, and on a great contract, but Faulk/Hamilton are plenty good, and Fleury stepping in is absolutely fine, with McKeown seemingly playing really well in the AHL in that same mold.
Meanwhile, Wallmark, McGinn, and Foegele are not fine. Foegele is struggling very mightily, and he still has the same number of goals as Wallmark and McGinn combined. No matter where you slide Nylander in, it's a really big upgrade for the top 9 in both goal scoring and playmaking.