Yeah, Wraiths are definitely very scary now. Basically same as before, a bit more expensive, but T5 instead of T4. Oh, whipcoils were kinda nerfed. They now just add flat +3 I, meaning they do fuck all when you charge a target in cover (Wraiths don't have 'nades). On the other hand it would be better against something like a big squad of marines in the open. Kind of a wash with the coils.
I guess if you don't run something like a classic wraithwing of 3x6 (which I don't think anyone here is inclined to do) it's still fine.
Come to think of it, it's kind of funny that one kind of spam build (wraithwing) has been beloved of minmaxers in every single edition of that codex, and got a bit better every time...