If you ever doubt the issues with mp management, watch a group do Enrage on T2 and see the 2 WHM are suffering by the end, while the SCH is sitting well over 2-3k for mana. I think shroud should be adjusted according to the total pool(not just because of T2-enrage; that is an example of the discrepancy). It doesn't make sense for SCH to have a massively OP mana regen skill +energy drain when they get free fairy casts and not have something even in the ballpark for WHM. I don't think both groups should play the same, but the emphasis on WHM having to take up AOE heals seems like a punishment when they cannot reasonably heal back mp as fast. And blaming DPS is kind of a lousy excuse, since it implies the WHM has to be dependent on another person, while SCH can roam free.

For the record, I play SCH as my main. I love that class and even though I have a WHM that is equally geared, I constantly switch back unless there are Party Finder restrictions.