I don't know.. It amazes me that they haven't touched mass dispel. These nerfs aren't over the top at all.
Mind spike glyph nerf: Doesn't matter a lot to be honest. The glyph is already very overrated as it is. Leap of faith, dispersion, inner fire, shadow word: death, vampiric embrace are all really good glyphs as well.
Phantasm nerf will hit disc harder than shadow, which is pretty sad to be honest. Body and soul will also be a viable option now for both specs. Sure it's a nerf, but shadow needed their nerfs.
Dispersion nerf is fair enough. More incentive to fake cast. Paladins and mages get penalized for getting interrupted in their respective schools. Be glad that dispersion isnt on the gcd.
When playing shadow it annoys me that our peeling through healing is so great. I wouldn't mind if all healing except from life swap, prayer of mending and pw: shield was removed. It's so pathetic to keep someone alive by spamming flash heal while your healer sits in CC.
Overall the nerfs aren't that big. Spriests still got their big devouring plagues (now over 6 seconds), 5 second silences, very good tankability, mass dispels, dispersion, life swap, good pressure, good burst swaps, and good CC with psychic scream and psyfiend/roots, which is why they are picked in most comps.
Feral nerfs are much bigger. Warrior nerfs are much bigger. Mages have endured much bigger nerfs. Affliction warlocks are still crap. Elemental and moonkins are still niche specs. I don't see shadow being dethroned any time soon, especially with our really good (unholy) DK and rogue synergy.