Except that he struggles (from mild to really troubling) with characters that:
-are better in the neutral (D'vorah, KJ)
-Zone (variably, including Shinnok, Kitana, GM Sub, Full-Auto Jacqui)
-have better frames or mixups from normals (LK, Cassie)
Notes on why he isn't top 10:
-The first hit of 21122 hits high, and frequently the second hit whiffs (might be character specific?).
-His damage is meh. For two bars midscreen he barely breaks 40%.
-Command Grab has very close inputs to Tarkatan Stab. Input Stab by accident and it's a punish. Normally I wouldn't even write this sort of thing down were it not so commonplace.
-He isn't ducking on the first frames of Slide.
-EXSand is inconsistent as an AA.
-negative 10 frames for landing a Throw.
-counter-zoning with Sand Grenade is nigh-hopeless in certain MUs.
His oki is fantastic and f13 is amazing (catching backdashes for a start), builds good meter + pressure with 21122.
But I am capable of thinking of 10 characters overall better than Erron Black.
He doesn't struggle with zoning at all, he can slide under most projectiles including Jacquis, Kitanas, and Subs(Subs ice clone plus iceball tactic doesnt even work on Erron because of the slide).
His damage is above average, not many characters can even get 30% meterless but he gets it pretty easily and thats not including chip/DoT with the sword and caltrops. He also has amazing corner carry which is where he gets most of his damage anyway.
This is an input error on your part. We have a couple of pocket Erron Blacks in my local scene and they all get command grab consistently, its not that hard with practice.
If you time the slide right it doesnt matter that he isnt ducking the first few frames. It has armor anyway so taking one hit wont hurt him.
Sonic Fox regularly anti-airs with standing 1, d1, low profiling etc. It definitely takes more spatial awareness and good reactions but it definitely isn't impossible.
REO and SonicFox counter-zone with one of his strings quite effectively(I wanna say 3,2 but I cant remember. He kicks the gun and shoots a bullet at them.). That + sand grenade beats most zoning.
EB isnt top 2 like people originally thought but he is still definitely top 10. And even if you dont think he is, I doubt you could argue that he cant win a major by himself, which means hes in a good spot.