Been watching the crap since uh...1990? The really early dragonball. Could count me in, if we take some of the toriyama's cheeky humor and quirky puns and not just the screaming and pounding contest that seemed to permeate in the later Z parts.

Dragon ball Super has spaketh there are 13/12 (??) Universes, with universe 7 being the Gokufest, just saiyan.

Nothing prevents us from making an entire similar-not-quite-universe. So AU, then.

As for stats... we know scouter numbers are bogus, after all. Plus Frieza broke them down by farting. 

I'd compensate the fact that having more power doesn't mean being any better. Circumstances can change to give people the upper hand.

In fact, having more power means you're less likely to be wary about things and subterfuge.

I'd use tiers, instead of a raw number scale and stats...

And ironically, lower tiers would allow you to pick secondary non-combat abilities. 

(So if anyone wants to make a Bulma, it'd be quite good for the team)