B) is the system that wow goes with for healers and its absolutely awful . it turns you into less of a reactive healer and more of HPS just following a rotation to get maximum healing output at all time . which granted makes for some decent healing mechanics but really makes you just a dps where health go up instead of down.
C) only really works if you give tanks back some sort of other mechanic because again you are reducing the class to a DPS . Vampiric tanks have always been a thing in MMO's otherwise there is very little you can actually do with the mit system.as a WAR , yes we could probably go with a nerf on blood-whetting and survive but PLD needs to really screw up their rotation to get any real use out of clemency and both really lose a lot of their usefulness outside of casual content