he does have a point... kaioken is much different then turbo..
1. its red
2. its not called turbo
3. ummmmm
ok ok well in the game its just like turbo..
in the show when they use turbo they dont get a pl boost or anything..it just makes em fly faster and stuff. the kaioken increases power, agility, and defense..but i think a kaioken would be ok for SSJ goku.. the super kaioken which could be used to launch a super attack.
anyway.. the Final Shine / Final Blast Bomb (as its called in ultimate battle 22) isn't pointless at all. i think you people that dont want it are scared of it
and i also think you are imagining it having too much power.. it could be the same thing as the angry gohan attack from BFP, but maybe just give it a few cool effects and maybe some other effect that would actually result in it killin you.. and i've been thinking..in the hsow vegeta put all of his life force into it thats y he died.. well maybe you could make it so that it drains your ki.. and if your ki reaches zero you start to lose life??? that would put a limit on it if you dont want to kill yourself, and it could be a gradual death like a kiblob (for the people being hit with it) instead of a instant like a final flash blowing up in your face