I have no "class fantasies" about MCH.
But question strongly the idea of yet another job to be homogenized in way of: If 2 pRDPS have utilities, so must the 3rd.

My CW(2x) averages around 7-8k and Impro ticks 1.4k.
But these abilities have so few "hits", that its not enough to build statistics on it without including hundreds of parses, not even considering various heal-increasing buffs that come from another jobs (SCH, MNK etc..).