Ben's already said they're calling back to this episode for future scaling. As for 'the latter of which feels more like an affordance/generosity against Superman' this is pure cope, until we see the next cosmic character in death battle, from Dragon Ball.
Also, forcing yourself into the future is an immeasurable speed feat. A dumb one, given its dub exclusive, but still. Even if they ignore it, Zamasu's nasty 'feat' exists, and outside your opinion on what they'd accept, there's zero indication that that wouldn't be something they'd accept in other episodes.(Bro, lets be real, they were using Heroes, so could've easily just used stuff from there alone, to give Goku immeasurable, but they didn't. They actively chose to use Zamasu, lol.)