Show me the last Vezina finalist on a bad hockey team?
@mar2kbos is 100% correct. Sure, a great goalie can steal you an odd game now and then, but he isn't going to carry a bad team. Henrik Lundqvist is the perfect example. Now, the Rangers are repeating the mistake with Shesterkin. The ONE exception might be Jonathan Quick on that 2012 Kings team.
Any goalie is only gonna play 50-55 games for you anyway, and the difference between a top tier guy making $8+mil, and a middle of the pack guy making $4-5mil is about 1 goal every 5-7 games. That doesn't move the needle enough to justify the salary. You're better off with a mid-tier goalie and using that money to strengthen the lineup in front of him.
Overpaying for so-called elite goaltending is one of the biggest mistakes a club can make. You'd have thought that teams would have learned after Carey Price......nope.