I'm currently lvling my low lvl whm and yeh, I never have mp issues, dont have to waste gcds for card gimmicks, just staight, pure healing, the way it should be. Ast honestly kinda sucks because of the terrible mp regen..I feel bad when I say that because I know some of you like the class, maybe it will get changes.
Whm allows other healers to off dps and just lightens the load on others greatly, without a whm I guarantee your group will struggle in almost any scenario, they are just that good.
From playing all the new jobs, lots of hours on each, they all feel sub par compared to the base classes (war/pld way better than drk, brd better than mch, etc)
These are just my observations, others may believe different, but I know what I see.