LOL Do you really have to ask? The advent of several BLU spells and SCH sucked a lot of advantage away from SMN in aoe buff area. Right now the only buff that we still have that hasn't been replicated yet is Hastega, but it's pretty relative to SCH's new 2hr, embrava. (Edit in: Also, a lot of buffs SMN can use are replicated through BRD and COR buffs as well, in tandom Garuda got Fleet Wind, which pretty much takes directly from BRD's chocobo marzuka.)
DRK already took Odin's lackluster thunder with the Twilight's Scythe's latent ability to cause instant death.
Alexander's perfect defense? A weaker, yet aoe version of PLD's two hour ability.
Atomos... isn't even out yet. The abilities is speculated based on the WotG story fight in which Atomos is summoned and used for.
It isn't as bad as you're making it out to be.
