I honestly don't see the issue here, aside from trying to solo a NM a conj has to learn a lil thing called "MP Management" and use all their available abilities and passive mode whenever possible to keep their mp good. Its been done in other MMOs and it can be done in XIV.

I was WHM in XI for 8 years and until Abyssea I had to manage my mp, working with team to conserve mp or have someone pop a skill to allow me enough time to rest up a small ammount of MP. when passive MP regen came out alot of people forgot how to manage their mp and started cure bombing to heal 1 missing HP since they can passive regen their MP instead of relying on Tranq, Radiance and Aethryte(sp?) camps. With this update we'll all have to relearn how to be eficient without spamming heals.