Makes sense.
He was acting excited cause he was fighting goku and he was winning.
So his dreams of granduer as the 'strongest saiyan in the universe' were looking obtainable.
Cause theres no way goku could go ssj2 and ssj3 in one day, thats pushing it even for the sometimes nonsensical insanely goku favoured plots of dbz.
So as vegeta is training harder for the whole time, he would have probably turned ssj2 before hand, theres no way to know really.
but whatever majin shouldnt be a stage cause it only increased his power a tiny amount. But perhaps if they made it a transformation, but that would be hard to do, a transformation where u can still go ssj and ssj2.
Ussj would be good. Or perhaps both would equal it out a bit for vegeta.
also he is not 3x 4x stronger than him at all.
he is not even 2x. if u consider there powerlevels at that time mr gump that figure would be outrageous.
Cell is like 150,000,000 when he fights goku, goku is about the same,
Gohan is 180,000,000 and cell is the same when he comes back.
so ur saying that vegeta is 45,000,000? U really have no respect for that man do u? How did he manage to hurt cell during that powerstruggle then? He was 129,000,000 i think. trunks was the same.