I don't know about it setting a new standard, no.
MoP was a standard-setter (which they strayed from in WoD and returned to in Legion), BfA was a cautionary tale in going too far, SL is... Well, I'm OK with it so far, it's better than BfA at the same point of its life, but not as good as previous examples set. Future patch content will be critical.
Also, fuck the maw. I'm ignoring the shit out of it from now until the end of time.