(FWIW my day job directly involves that Act.)
Beach's ruling determined that Apple should not be allowed to block, as a policy, competing app stores. Beach also recognised that Apple's commission is not merely a payment-processing fee, but a means of recovering its investment in the broader ecosystem, including developer tools, security, app verification, distribution infrastructure and intellectual property. He also acknowledged Apple's entitlement to a commercial return on those investments.
The question remains how Apple can get the commercial return which Beach acknowledged Apple is entitled to, given the weirdly arbitrary restrictions defined in Beach's order. This contradiction is left unresolved and is begging for an obvious overturn on appeal.
I personally have no problem with competing stores, so long as they're not just a mechanism for redirecting money previously going to Apple into their own pocket. But this ruling doesn't establish competition, because there's not competitive reason for alternative stores to exist except to avoid fees which Beach acknowledged Apple is entitled to.