Not sure where you get Subban regressing last year. He put up 53 points and was a force at playoff time. He's had a rough start this year, it happens to all players, it's called a slump not regression.
Pacioretty developed into a 39 goal scorer with MT as coach...again, moronic to call that regression. I have never heard Desharnais malign Pacioretty, you must be imagining stuff, even if he did what does that have to do with MT and Pacioretty regressing?
Galchenyuk has been one of our best players so far this year, if you missed him you're obviously doing something other than watching hockey when the Habs are playing.
Gallagher put up 41 points at 21...like Subban he's had a bit of a slump to start the year, doesn't equate to regression in any way, he's getting the chances but snake bitten.