Red Mage looks Incomplete

[ErryK]

No MP regeneration I would think would be a huge issue for any caster.

There's Lucid Dreaming and Max-Ether (and the inevitable Lv70 Ether potion) that can help with that. But it is a bit jarring that RDM is the only caster Job with absolutely no native MP regen skills, SMN has Aetherflow and BLM has Umbral Ice. Yes, it's true that RDM uses TP for some skills, but those skills are only used once for every 80 Black and White mana generated.

[Wilan]

But it is a bit jarring that RDM is the only caster Job with absolutely no native MP regen skills

Well, the same way no healer has a native Esuna or Protect nor any ranged has a native stun/silence. The idea of Role Skills is that it's a toolkit that you're going to need for your role, it's part of your build and not something extra. Lucid Dreaming will probably recover about 50% of your MP every two minutes, and if you have a built-in mechanic that already does that for you you can pass on it and take something else. Also, I've heard a rumor that Aetherflow's MP recovery is getting nerfed, but I can't give you a source on that.

Beside, it's not like RDM is starved for role skills anyway. I went through the list yesterday and the only mandatory thing seems to be Lucid Dreaming, everything else is situational at best. Even Swiftcast, the iconic mandatory role skill, is already built in the RDM's mechanics.
I've personally selected Lucid Dreaming, Swiftcast, Addle, Apocatacastasis and Erase, but it'd be easy to give up any of those if you needed Break for a specific fight or something.