You know, besides the whole FRKZ thing or deciding between whether you want seals or damage. Or learning the specific stuff for the J.c relaunch. Also, D nails> air-dash can be mashed out of, the only time he's at a decent frame advantage from them is TK'd up close. If you let him straight up air-dash into you then you're giving him free pressure.
Sure he's not the most complicated character in the world but he requires a bit more thinking than that.