What on earth would be difficult part with kazuya if not the mechanics?
Your offence loops itself thanks to HS and ff3 oki. You get that looping offence from your basic 112 knockdown and you control space with ewgf basically for free.
The only thing thats kind of difficult with kazuya besides the excecution is that you lack a generic df1, and you still have an i13 mid in df4 with a good hitbox.

BTW if someone wants to play a few, feel free to add me: 310805850