Playing and raiding as a shadow priest there are some wishes im always debating with a guildmate. Shadows should have some improvements in different fields imo, and I'll share our thoughts with you. tell me what you seriously think
CC:
Silence - should either have a smaller cd (10-20 secs) or it should need only 1 talent point spent. I am aware, that shorten the cd of silence would have a huge impact on PvP, but compared to mages, who have 24 secs cd, and with 2 talent points same effect but 1 point less and a shorter cd.
Mind Control - nerfing attack (and casting) speed by 50% but giving the ability to still interact in the fight as a shadow priest instead of standing around and do nothing but CC. So to say granting shadowpriests some kind of "pet". Could also be a glyph or a talent point in order to make it less attractive to disc and holy priests.
Shackle Undead - Turning to "shackle evil", which allows to also shackle demons and elementals.
Support:
Vampiric Embrace - Though vampiric embrace grants the ability to heal the group, its also very limited. There are several possibilities to change it. Though i personally like it a lot, dont get me wrong, but its not really interesting. except for granting vampiric touch etc. Could be either raidwide, or smart buff, like heals you and the lowest 3 raidmembers by 10% of your damage done.
second option would be to make it an aura, like grants the ability to raidmembers to heal themselves by 5%? of their damage done.
Could also add another buff to raid DPS, but that would be illogical because that wouldnt be vampiric at all.
Oh and a graphical aura on the floor similar to the one in WC3 would be cool, because except for the black glow shadows dont look that evil like their cast tooltips. And shadow orbs look is lame !
Mana Support:
I believe its dull to have to manage mana that much while in the 25% phase of a boss you almost end out with full mana. Dont know how you other guys struggle or dont struggle with your mana.
AoE / Mass Damage:
Adding a different talent as the ultimate but not totally remove dispersion:
Misery loves company (channeled) - spreads your vampiric touch, your shadow word pain as well as your devouring plague among all enemy targets in 20 yds range of the priest (or the target) at half duration. (while you channel they also refresh themselves) other options would be it channels for "lasts until cancelled", but that would be bleh. But it could also have some long channel duration. the idea behind it: you dont make much damage initially but it improves dps in fights where there are a lot adds.)
Balance of stats:
Critical strike and mastery rating: improve the utility of these two to have the same value for shadowpriests like haste rating does.