<--- Is going to lay some whoop ass on tien one of these days
1.) You can't remove Krillin. He's been in *every* saga and has fought (or tried to fight) in all of them too. He has a moderate list of attacks, and a lot of people just like him.
2.) In the show, goten uses kamehameha. Dink. Thats it. "Super kamehameha" is not exactly a whole other move. More like an extension. Super blast? Double palm blast? What exactly is that? Sounds just like he threw a generic ki attack or two. I have no idea what super gokansan is; have to explain that.
3.) He has one transformation: SSJ. That's an interesting idea though, making trunks appear and fusing into gotenks (thus getting more attacks.) that sounds like it could work.
Bah, I think it would be a way easier thing to just throw in gotenks. I mean, lots of people love goten, but i bet there's more gotenks fans.