Originally Posted by
Tehterokkar
Shadow is already pretty solid, should be even more so in 8.1 with the buffs to high-end players who manage Voidform correctly.
On top of that, Shadow has pretty premium raid utility in the form of Mass Dispel, which is pretty much required for Zul Mythic. If there are fights like that in the new raid or in the future(I haven't looked at details/dungeon journal of new raid yet, so can't comment specifically on Zuldazar raid), Shadow Priests will definitely find their way into raids.
Uldir was a lot about burst DPS target switching, something Shadow Priests aren't that great at. From videos of Preach that I've seen, there is a lot more traditional multi-dotting in the new raid, which should help Shadow a lot in terms of community's perception of viability(AKA WCL parses :/)