Well it's not totally accurate...but I can give u a good idea of who are the top 5 chars in this game and also the top 10 chars who I really hate playing....
Once you play against people who know Nightmare really well, his mix-up game disappears entirely. IMO in this current state, he was stronger in SC4 as though he didn't do as much damage and was equally unsafe, he had better zoning tools, better okizeme, better close range mix-ups, tech-traps; the list goes on. The backstep and throw nerf really did a number on him.
NM has mixups? *giggles* Imo in this game he is supposed to be played as a whiffpunishment char, hence his extraordinary backdash and the high pushback/guard burst dmg.
Yeah but his backdash is quite bad now (backstep= free lunch for smart players), his long range whiff punish is actually quite weak due to the poor inputs of most of his long range moves (and non-guarantee on follow-ups)
and with JG, Nightmare's high pushback/guard burst dmg moves all become super unsafe as they are extremely easy to read and JG. The baiting gameplay/ distance closing gameplay he used to have in SC4 and early SC5 is gone, along with his mad okizeme and pressure game.
Also he is not as fun as he used to be. Everything which was fun about Nightmare is now gone. Im actually thinking of changing mains lololololololololol. Don't get me wrong, im still very successful with him; I just feel that he doesn't reward me enough to continue to continue with him.