While they did add a lot more character this time around they are still missing forms and characters. Piccolo don't have his "Sync with Nail" or his "Fusion with Kami" transformation states. Androids 13,14,15 and super 13 should have been in. As well as Pikkon, Golden Oozaru (since he is slow and kind of sucks anyways)
Also in the storyline they could make a "What if" section. Things that happen for certain characters that are just about them and that don't follow the normal DBZ/GT storyline. A great way for them to "some how" let you play Super Saiyan 4 Gohan, or Super Saiyan 3 Vegeta.
Yawn - what is there to say?