Forcing the stores to have all the apps would be bad - swamped in shitty malware.

Stopping the stores from demanding that all apps have no method of payment except via their payment services (and its 30% cut) would be good. It would solve the situation in TFA at least.

I think there are a couple of different pieces of legislation, and the "allow multiple stores without discriminating" one is a bit more recent so they may not have seen that one yet.