Vegeta only seemed tough because he was 90% (form 1) complete versus everyone else's 10 - 60%, with the exception of Goku, Freiza and Cell (also around 90% for form 1).
His splash damage is now limited because:
A) The maps are larger, due to the 1/4 scale down.
B) Final Flash can be done while SSJ only.
C) Capped splash radius.
Most of Vegeta's moves can only be done while standing still now . . . only the Gallit Gun can be done while moving. Vegeta has become a damage juggernaut with little mobility. The Big Bang will also cost more ki than 2.0's Big Bang. (Which was neccesary for those of us who have seen a 22 million PL Vegeta
)