ok. if vegetas last trans was ssj2 that would be rather disapointing because, if you have vegetas final form as the equvilent as gokus 2nd form then it will look out of place because we all know that majin came after ssj2 (i know that he wasnt as strong as he was after he came back from the dead as ssj2) but if you have a level above ssj2 (which is ssj2 with the added power of majin) then it would be silly to put it as the secondary trans instead of his final.
it can also be put like this:
ssj2 vegeta before sacrifice = 1
majin ssj2 vegeta before sacrifice = 1.5
ssj2 vegeta after sacrifice = 2
(if it happened) majin ssj2 vegeta after sacrifice = 2.5
you see the majin power up will never be worse than the current final form if it is added to the current entire potential
it can also be put:
not again, let's explane vegeta for the final time ok:
it depence whitch vegeta is gonna used, there are 2 kinds of ssj2 vegeta.
vegeta befor majin and vegeta after majin, the ssj2 befor vegeta is 200.000pl weaker but the ssj2 vegeta after majin is 200.000 stronger.
if you have goku right? at the start of the saiya-jin saga he was almost equal with piccolo then say in the buu saga (still in his first form, normal) he was like 100x stronger than he was in the saiya-jin saga but that doesnt meen that he is different like you seem to think vegeta was he is still ssj2vegeta and majin still would make him stronger.
thats about it.
oh and:
The cape is weighted, taking it off would increase your speed. Transformations increase your speed, strength and powerlevel.
If you remember the saiya-jin saga when goku and piccolo prepare to fight radtiz and take thier weighted traning clothes off, raditz even states there power levels have risen. It was only by a little but the power level still rose...
on topic:
i agree with you if they put adult gohan in then teen gohan will need another trans and yours is perfectly logical or instead of the cape how about just that neck thing that nail has? he does where it.
oh and off topic again:
why the hell is he teen gohan if hes 11?
and whys he adult gohan gohan if hes a teen???
so confusing