There's a strong chance this will be shot down as "bad-faith" compliance. Rumor is Epic will quickly contest it [Update: confirmed] https://twitter.com/timsweeneyepic/status/174740814726057173...
It's the weakest objection you can have, and typically would only be sufficient to get relief in very, very specific circumstances where the unfairness could be proven (as intended). But this case involves broad policies for millions of developers, and it's perfectly compliant with permitting other payment processors.
So: there's almost no chance it would be "shot down" on those grounds.