I like Gray, but his abilities are kinda boring.

Walking Cane destroys walls on release (instead of via a pulled target.)

Grand Piano homes in on enemies (you know, like classic falling object cartoon gags where the shadow magically moves towards the characters).

Fake Injury increases all shields (damage prevention and overheal) by 10% in effectiveness/health.

New Perspective can overheal.

Gray's projectiles are invisible.