Don't get distracted by the shiny object that's right in front of your face. Neuvy was being SHOWCASED for a trade he demanded, and that's probably about as good as you're going to see him play as a Cap. He stayed focused and didn't lose his composure after goals. He was quick and attentive to most details (except a few shortside gaps), but he was also lucky and had help.
He has wanted to be an uncontested #1 for years and has seen Varly, Vokoun, Holtby and Grubauer blow by him. He is NOT going to tolerate a 2 headed monster, nevermind a 3 headed monster.
Joe B and Locker were clearly pumping Neuvy's tires in the broadcast and even buttered up his agent a bit at the end of the game. He is clearly being shopped and it would be a mistake to get distracted by good vibes from one game.
Trade him asap while his value is as high as it's probably going to get (why risk it further), and then let Holtby and Grubauer settle in to duel it out.