I think for a deck that embraces flooding the field with characters and bouncing would-be-banished characters back to your hand, the cards that let you heal (which are almost never useful in any trading card game) are wasted space here
As one of the strongest Sultai cards it still sees quite a bit of play in Vintage and Legacy, the only other formats where you can play it
All were doing is adding a commander which either weaponizes that storm count directly, like Thrasta, Tempests Roar and Aeve, Progenitor Ooze, or which accelerates the natural snowball of resources so we can eventually combo into a traditional storm kill: Gandalf the White, Karn, Legacy Reforged, Jhoira, Weatherlight Captain or Kinnan, Bonder Prodigy are great examples
This was amazing with shuffle effects like fetch lands and Gamble or with rearranging like Sensei's Divining Top or setting with Brainstorm or Sylvan Library or Scroll Rack
Additionally, at a reasonable cost, Ultimecia can transform into Ultimecia, Omnipotent, a significant upgrade that grants the player a second turn
That lowers his power level quite a bit