Yeh, in the very long term (we're talking 6 months ahead of where Global is, because JP version is pretty much a detailed roadmap) there's a Holy Trinity of 5* abiltiies - Meteor, Valefor, Full Break that don't step on each other's toes in terms of requirements.
I suspect Flare will have its luster restored when 9999 cap is lifted and I suspect Ultima will be AOE 12x or less (12x is the multiplier Flare has).
p.s. practical application of my meandering ramble above:
GILGAMESH
(boss RES at dLvl120 dungeon is getting respectable, although Quistis (lol) with Devotion was still hitting for 9999)
Swapped in Quistis and her shitty MAG stat over Tellah because I felt I needed both Power and Magic Breakdown. Didn't heal at all and Gilgamesh died on turn ~7 (Vivi had 2 casts of Bioga remaining, after using Focus to brute force through the Shell Gilgamesh gets at low HP). I want to say I could have swapped Curaga out for Dispel, but it did help top up during trash waves. All 3892478932749 of them.
Also they fixed the crash bug! Vivi's memory crystal turned into a greater egg instead of crashing the game like Wakka's.
edit: Regarding autosaves, as far as we can tell, everything saves to the cloud, but account management is rather finicky and instead of an actual login system, accounts are tied to device, and can be linked to Game Center or Google Play (or facebook/one-time-code for cross-compatibility) Linking your account to Game Center or Google Play will allow you to sync your data to another device with the same Game Center or Google Play information.
For whatever reason it's practically impossible to unlink devices that have been linked to the same Game Center/Google Play resulting in a lot of really silly account overwritten cases DeNA whyyyyy