I don’t really understand the 1st requirement…

allow 3rd-party app stores

So, apparently f-droid/aurora/etc are not allowed or something?

let stores distribute the same stuff gplay does

As in “give 'em a way to pull stuff from gplay and not punish for letting ppl download it”? Mb useful, but the lack of specificity may defend the purpose. Like currently, AFAIK, nobody really prevents ppl from publishing both on gplay and f-droid, for example

The rest lgtm