Players of Crosby's talent really can't be stopped. Its very similar to Jagr when he came into the league, his shots from range were aweful. All he really had was deke's around the net, most notably to his backhand. With hard work and instruction from Kehoe, he now has every shot in the book, and excellent ones at that.
Crosby is a student of the game, he'll be rock solid or dominant at every situation by his early to mid 20's.