We don't know how stronger he was, but we know that he was already much stronger after getting pushed back by Vegeta. And if I fighting genius tells me that they don't understand how powerful they became, then I think it's pretty telling that we are dealing with no average power-up here. We also know that he had not even reached his ceiling yet, as he planned to get stronger from the rage of Goku and Trunks after Future Zamasu killed Trunks, Bulma, and Mai (which he failed to do, due to the Mafuba technique).goku the krump dancer wrote: ↑Thu Dec 12, 2019 3:17 pm
We don't know how much stronger Black was over Goku and Vegeta once he got his Ki Scythe. Vegeta dodged Black's initial strike fairly easily, it wasn't until the portal thing opened that he gained some sort of upper hand because they didnt know how to get around that illusion thing or whatever it was. Had Black towered over Goku and Vegeta that much, he would've just killed them right there and Trunks too but instead opted to fuse instead.
There were no Zenkais in the Tournament of Power Goku and Vegeta constantly powering up into Blue even after constantly being beat down was just tenacity more than anything ( horribly executed btw) but by no way were there any near death power ups. Even Ultra Instinct at the end of the day was achieved just by Goku's sheer will not to lose. Same with Blue Evolution.
He probably could have killed them if he wanted to, or anyway he could have greatly damaged them. He just chose not to. There's a reason why he never fought them and just let his clones do all the work. He still had some uses for them. He never went through with this plan for a simple reason: after seeing just how shocked Zamasu was, he pussied out and fused. They both overreacted. I can't blame them, because Future Zamasu came very close to being eliminated from the battle. Finally, Gowasu mentions in episode 65 how Black had ultimate strength, and if I am not mistaken a Toei writer even said once in an interview that Black was the strongest non-fused character (excluding Beerus and co. of course), but I'll have to check this.
We do know there were Zenkais in the Tournament of Power. Vegeta berated Belmod for thinking that Goku had reached the limit of his potential, and reminded him that in those 48 minutes each Saiyan, even those of universe 6, managed to break their limits and ascend to an even higher power, so he pointed out to Belmod that it was foolish to believe that Goku could not step over the state of the Gods. Zenkai aren't just near-death power-ups.