Since some months now, it appears that World of Warcraft developpers decided to move the shadowpriest spec from its PVP nature to an exclusive PVE one .
That is a major change in the nature of that character, its gameplay, and its choice when creating, levelling and stuffing it .
The nature itself of the Shadowform is lost, we cannot understand this choice, in terms of roleplay, of gameplay, or just respect a community behind this pixel cloudy character .
The only reason we can see is making it easier to formerly define a class for PVP or PVE, than balancing all three specs.

We, Shadowpriest, adepts of PVP, would like Blizzard to keep it reliable in those situations where we had enormous fun to play it and felt a good decision to invest time in it,

Please, keep the shadow priest a PVP character .