I much prefer the standard healer mana regen model..... steady mana gain thru procs and buff mechanics that trigger from heals or crits, plus a mana cd when you need that extra boost. It's what we had with WS+resurg and MTT, along with every other class. Healing is already very hectic, let us use our break for what we want.
When Blizz made monks, they gave them options to either do a traditional healer playstyle, or play a melee dps healer monk. They should either go back to just traditional mana regen models, or if they wanna add an active dps mana regen model, make it an alternative playstyle. To do that, we would need some kind of triggerable passive buff that nerfs our typical passive regen in exchange for ability to gain more actively thru our dps spells. This way it doesn't nerf our normal mana regen, but people who like that playstyle can still play with it.