Not sure what the issue is cuz Akira is dope as hell in U. I'm not having issues using him lol
Free Step Dodge
His Reverence
Zeo
Did you not play him in Vanilla? If you didn't you won't see what many other players saw that he lost. But even if you didn't you should see the horrible recovery on most of his moves on block and whiff, that's his biggest issue.
Zeo
In a nutshell they made him feel slow, stiff and un-natural.