I agree to bring back Mind Spike as a burst tool. But we should always keep Mind Flay. It’s always been part of our core toolkit and I think it serves a great purpose as it frees up those “moments” during its use for us to look around for opportunities to use our other toolkit utility abilities like Mind Control, Shackle, Psychic Scream, Vampiric Embrace, Silence, Leap of Faith etc.
I included Mind Spike in my take on how I would approach the 10.0 talent revamp.