The warlock fear is destructive for the game, considering how easy it is to spam and land.
They need to fix fear without destroying other classes, this can be done by either:
-Making psychic scream an horror effect and keeping fear removers
-Nerfing warlock fear heavily and removing tremor, nimble etc.
I would like to know why priests got 4 different fear nerfs in one patch: duration, cooldown, talent and dr sharing. I mean has psychic scream ever been part of the problem? As far as I know this game has been in a terrible state every time warlocks and shamans are too powerful, that's what needs to be addressed, without also nerfing other classes that are already mediocre at best comparing to those.
I don't know how this will affect the game overall but this glyph has a design flaw.
Some healers already need 3 glyphs to unlock their pvp specific abilities, others have "blank" slots filled with non crucial glyphs. Those will have easier access to this glyph.
This is wow arena, not goalkeeper academy. This game doesn't need ridiculous reaction time.
About reflexes,keep in mind that a good chunk of fighting game professionals are in 27-35 group. So I think you will be ok.