Yes, that's possible, but wouldn't a lot of guys also be able to put up similar better numbers on that better team? If we could realistically put a bunch of different goalies on a better team and any one of them could plausibly put up top 5-10 numbers, how does that differentiate one from the rest? And, at that point, wouldn't the goalie technically become a product of the better team, which would take some of the luster off of their performance? At the very least, it makes it difficult for me to put much stock in "if he played on a better team" argument for goalies.
With that said, I agree that there's no good reason for the Avs to make a change right now. They are currently tied for the best point% in the West, lead the NHL in scoring, and have a top 5 goal differential and we still haven't seen a game with everyone healthy. I'm not sure how much better the results could realistically be, all things considered.