I actually kinda liked the Shadow Okumura "fight". It fits him, and forces you into awkward situations with the suicide attacks, by making you deal with that one before it explodes. Cognitive Wakaba was definitely pretty lame though.
Also I wished they had made better use of the "sending your party member to do something" thing. I mean, every time I can remember it, it was mandatory. Except for the first time, against Shadow Kamoshida. The reason I liked it at first was because it gave you an option, lose someone for a bit in order to get a significant advantage, or grind it out. At least, every one I saw, its possible there were more, and I just finished the boss too quickly to see it.