Nu Mou are certainly not useless. Not with acces to the Arcanist job and its Level 3 Dark, which, since level 99 is the max character level means... Ta-da! Endless Lv? S-Flare has returned.

As for the zero MP thing, there is easy access to Half MP, and there are good clan privileges for MP with MP Efficiency and MP Channelling. I think the zero MP at the start of battle was meant to cripple the Ultima-spam-wins more than anything else, to be honest. By level 50, a clan in FFTA could win a battle in one round by just using Ultima. Now, most of the cheap spells are availible in one turn anyway, and several of the more expensive ones will get there with Half MP. And with the addition of things like Magic Frenzy Illusionists, MP does need some restrictions. I just think that Nu Mou should have access to a better MP regen or something similar to make up for the new magic restrictions.

The bazaar system may still make some items difficult to comeby, but it is far better than FFTA's system (and it is also far better than FFXII's bazaar).