The problem is that he's the best assist in the game and a very strong character himself. Unless you use some sort of specialized team there's not that much of a reason to not use Vegeta right now.
Also the game doesn't seem to have varied play styles because any sort of keep away is 100% demolished by vanish & super dash. You can bait them somewhat but once your in the air only consistent option against super dash are supers and invuln moves as far as I can tell. Some normals work from some angles sometimes, but that seems fairly inconsistent generally with poor risk-reward if you mess up.
So you rush down and Vegeta locks them down for 30 years while covering all tech options. I've been playing some other characters, but it gets harder to argue against replacing goku or goku black (when vegeta isn't already on my team) with vegeta considering the massive boon to the single play style allowed in the game. Goku black i think is a better character than vegeta though, beam assists have their own massive boons also since Vegeta doesn't reach fullscreen.
I honestly wish ki attacks (5S, 2S, and j.S) had more viability in the neutral, beams are decent but my only complaint with the game is its hard to argue 'playing what you want' when most of the cast is so similar there seem to be some characters that have the same stuff ... plus a little more. Why not play the ones with 'a little more'?
This is true, but only with what we know so far. We still haven’t had a meta defining early team come up. Just characters that are strong that are thrown together.
Till a good meta team comes about that stacks synergies and the sum of its parts get stronger when coupled to its teammates, it’s hard to make any general calls on the game.
Like yeah, most characters seem to play the same, but if you look at their movelist with regards to specials, ex moves, S button functionality and and varying properties of normal moves, there’s ALOT of differences in the cast it’s just that the game is being played at such a basic level right now that it’s going to come off homogenous for the most part because no one really knows how to make use of the non basic shit yet.