Event Horizon said:I'm aware of how zenkai boosts work. Logically they would, but they don't have to have gotten it. Zenkai boosts were pretty much abandon post Freeza arc. There must be some proof that they received zenkai boosts, otherwise it's just baseless. There are no statements regarding a power increase after coming back from near death, nor did they do any better fighting Black and Zamasu. Them receiving zenkai boosts isn't supported by neither statements or feats. You're just saying they have to get it because they did way back in the Freeza arc, ignoring that they didn't receive anymore after that.
I'd buy it if there was statements referencing a power increase, or Goku and Vegeta actually doing better against Black and Zamasu. They got beaten, came back, and beaten again just as badly as the first time - something that shouldn't happen had they received a zenkai boost. The only time they did better was after Vegeta had trained in the RoSaT. Even without statements we know Vegeta had increased his power, since he's now beating Black, something he should've done long ago had he received a zenkai boost, but no, he did it first after he TRAINED!
This is ridiculous. The zenkai boosts just weren't large enough to make a difference for a long while. They never just stopped working.
Considering Black's rage boost against Vegeta is unquantifiable (it was only shown to give him a new ability) it doesn't matter how little the zenkai boosts Goku and Vegeta got after that fight were. They would still be above Black as it was never made clear Black ever caught up to Vegeta again (Vegeta easily dodging Black's energy slash doesn't help Black's case) and even if he did catch up to Vegeta even the tiniest of zenkai boosts would put Vegeta back above him. And Goku has clearly caught up to current SSB Vegeta as Beerus made Goku the lead fighter (which he wouldn't do if he was a fuckton weaker than Vegeta).