Eh, I'm not exactly inclined to agree with you on that based off of the little footage we have of him. Most of the combos we see in the footage have at least one persona attack stuffed in. Teleports seem to be his only good way of getting in, and they can get beaten clean by properly timed 2Bs (a Yosuke demonstrates it at about 12 minutes into the 5th Sasashima video; the port attack seem to be Head attribute, as an invincibility notification circle appears just before the 2B hits).
Command grab is probably really good for mixups, though. Kinda wondering why the SP-draining version was never used by the PerShoNa.