I'm not technical goalie expert, but biggest difference i've been able to find in Price's game is he doesn't seem to be over-sliding as much this year
His movements are a lot more economical, he's making difficult saves look routine, which is what we saw a lot of when he burst on the scene
He's changed from dropping a knee and pushing off for speed to shuffling which is much more economical, you're right. This is also causing him to play deeper in his net than previous years because it takes a bit longer to get post to post which forces him to use his athleticism more, also a huge bonus for him.