I've only just learned that Mirio and Ida's Alpha follow-ups have auto-aim if you have the right timing. For Ida's in particular, this makes his Alpha WAY easier to use.
I'm thinking about the implications of Star's special action. Taking no damage while in the field sounds insanely strong. I'm guessing it'll probably have one of the longest cooldowns in the entire game, and/or you might still experience hitstun and knockback when hit to give it some semblance of counterplay.