Void Elf got the best racial for casters and it’s the most fitting race for the Shadow, for sure. You can also think of your Velf as an once elf or even a body possessed by some eldritch entity!
Nelf look good too. Remind me of those necromancers from Scholomance. There’s also the dark side of Elune (check what happens in the temple of Elune in Tomb of Sargeras), which fits them well.
Human always remind me of Twilight’s Hammer. Fit pretty well too.
void elf for sure , if u still want nelf make a druid or hunter ! then youll get best of both worlds .
Nightborne.
Perhaps they can make more glyphs and this could be a priest variation. I really do miss when they used to make glyphs.
I 100% agree, it would be nice indeed. I was hoping hero talents would have something to that effect, honestly.
Glyphs or take a page out of Warlock green fire quest. Which Blizzard vehemently hates because it creates more work for them.
It’s better but it still has a bunch of shadow schmutz on the character.
Vulpera does 
i like nb but they still need more cuter faces TBH
None of the above.
If you must be alliance, the only true answer is Dwarf. In the case of a Shadow Priest, Dark Iron Dwarf.