ok:
we dont have a vegetto in esf, so u can kick that idea.
every site with dbz attacks says that a big bang is a ball. come on, it sucks if vegeta has 3 major beams.... everybody has something special besides a beam, piccolo has makankosappo, krillin a disc, goku a genkidama, cell has very much other things, etc.
and vegeta cant make bigbang beams in ginyu saga, because he learned the bigbang as ssj. he made a pseudo final flash, i think he trained for a special technic which is pure destruction: the final flash. but it costs so much energy that he decided to make it when he is stronger and has more energy or when he mastered the ff so it doesnt need so much energy anymore. but big bang were learned by him after he first turned ssj.