(As far as I can tell, none of the classes are 'fine as it is', and they all need feedback, so what's the point of arguing?)
I'm going to do some Mindcrafting (tm) for what is currently shown for shadow priests, in a PvE situation
Psyfiend, without a doubt. Even the second line is a wording mistake and not an AOE CC, it's still a CC. Mind Control is awesome and all, and I've managed to streamline doing it, but it only works on humanoids (Side thought: Mind soothe works humanoids and dragonoids, why can't MC also work on the other type of consistently intelligent mobs?), and requires coordination with the tank. Not that I don't like MC, I do, I use it at every opportunity, and it the most unique CC in the game IMO. Shackle I used in the ICC 5-mans, and occasionally other places, use right now in Blue Dragonshrine of the DS 5-mans. But the Psychic Scream would put me on par with hunters, rogues, mages, etc in terms of CCCCCCC that is beginning to not look real. Plus I can use Psyfiend for 'oh !@#$' moments.
Body and soul, still without a doubt, unless the fight has snares that aren't ignorable/easily gotten rid of.
Whichever one theorycrafters tell me will get me the most damage, although I doubt Divine Star will be in the running.
Final prayer. Don't have to interrupt DPS to do it, and it might as well be built into the trees to free up a tier.
An actual choice this time! Execution vs. long-term/average fights vs. burst.
Not Vow of Unity, can't use it at all. Void shift will be interesting and awesome, especially when combined with dispersion to soak things, but very situational, so probably Vamp for most of the time.
With DP gone, we loose imp DP and a source of self-heals, but I can see where two DoTs was seen as redundant. Build the DP mechanics into SW:P would be my suggestion. Without it, even more weight is put on choosing Vampiric [Why was the name changed anyway?]
In other words, it's pretty cookie-cutter. A tier that was [Personal benefit with a rating of 3] vs. [Raid-wide benefit rating 1] vs. [Shared duo benefit like locks and mages, benefit rating 2] miiiiight not be, and also re-introduce more utility.
Inspiration is gone, and because I fail I thought the shadow haste buff was gone too, which lead to the thought of a tier that's a choice between what buff you give; damage reduction, haste, annnnnnd...something. Hit? Not stamina, keep Fort as a baseline.
Also, is Darkness completely gone, as in not built into Shadow? I can't see it as a glyph since it doesn't change a mechanic, and is just the damage increaser that is being moved away from when it comes to choices.
I can't see Twisted Faith as a glyph, since it is so core to gearing for Shadow priests, and hope it's built into the spec. Don't know if druids and shamans also lost thier spirit->hit thing.
I'm going to go ahead and guess at shadow glyphs, with what they do written down because I have the memory of a bug:
-Harnassed shadows (Second part, gaining an orb from being critically hit)
-Masochism (10% mana with shadow word: death/10% single hit)
-Paralysis (Mind blast crit causes target to be unable to move for 4 seconds)
-Sin and Punishment split into two glyphs (Fear from dispelling VT and crits from MF reducing shadowfiend's CD by 5 seconds. I could see these synched up with Atonement by adding smite or holy fire crits to that)
-Pain and Suffering (Damage taken from SW:D reduced by 40% built in a x level. Again split, the refresh SW:P part I am hesitant to include, since it is a required thing for PvE, but I have no idea for PvP. Also, it was previously a glyph iiirc)
(As they currently are)
-Shadow Word: Death (Double cast on targets it doesn't kill that are below 25%)
-Psychic Scream (They stand in place, but the tier 1 talents make this still being here unlikely)
-Spirit tap (Kill something with SW:D, you get mana)
The problem would be that it would be like the tiers, just more of the stuff we've seen before. Many of those should be built in (In my opinion), with cool new toys to play with coming out. Especially since, for PvE, it would be a no brainer on what to choose, since 3 of those 9 are PvP/solo, and 1 is unlikely to still be here. Whether or not those current-talents are going to be available will change our priority/rotation significantly. And by significantly I mean reapplying SW:P with procs vs. lining your procs up at the beginning and maintaining, SW:D even being relevant, mana regen, and the seeming RNG of casting Mind Blast.
And here's to hoping we get Greater Heal, PoM, and Renew as baseline spells.