SCHs do not need changing or altering, they do their job as the more powerful single target healer in the game.

By introducing a "stacking" galvanise they'd pretty much be invalidating WHMs, which is something they should not do, unless they buff WHMs.

I'm all for changing setups which may be optimal for certain fights (I.e 1 tank 5 Dps 2 heals in T8) but its not something that should be in the majority of fights. 2 SCH or 2 WHM should also be inferior to the 1 SCH/1 WHM set up.