Monks have the worst Mastery of all the healing classes for one simple reason. It has no synergy with our other spells.
Every other healer in WOW has a mastery that directly buffs their spells in some way. Monks mastery creates its own stand-alone mechanic that requires people to actually go out of their way to use it themselves. We have no control over it. Even in my guild when people know to watch out for those little green balls and to take advantage of near ones we still regularly finish fights with dozens of them still on the ground, wasted.
I like that Monks are different from other healing classes, which is why I chose to heal on one, even if it is sub-optimal on many fights, though this one aspect has always bothered me.
What I would like to see happen to our mastery would for it to have some type of synergy with our other spells. For instance have a mastery that grants a shield for a % of our heals on the target if they are already at full health.
Over healing happens often as a MW due to the nature of RM and Uplift spam. This is the core of our healing and the so-called smart heal of RM is often sent to someone who in no way needs it. It also happens frequently due to needing to prep RM on as many targets as possible in preparation of high dmg phases.
I don't feel this would be too OP but I could be wrong. Thoughts?