Note that Apple wouldn't be just be forced to loosen some restrictions to match Google Play and Android, they'd have to go far further. Google Play is also being sued. Its not as dramatic or fun to cover it that way, but I feel like news orgs could be doing a lot better here.
Android is already a mess with multiple stores and loose, to put it mildly, standards for the quality of apps. And that still isn't enough for Epic. I don't want my iPhone turning into an Android (I did have many choices, and I chose iPhone) and I __definitely__ don't want it turning to an even less regulated ecosystem than what we already have with Android.
I don't really care if developers are happy, because so many of them have interests hostile to mine. Apple is fortunately big enough to be able to force folks like Facebook and Uber to play by the rules. They're also big enough to force developers to play ball with things like iPad support or get booted from the store. The cost of targeting iPad is less than the cost of e.g. Twitter losing their spot on iPhones, so now iPad has a great Twitter app where it didn't before.
Edit: forgot to mention how Apple's subscription management process is far, far superior to any other device. I explicitly choose to subscribe through Apple because I know I will be notified before renewal and that I can cancel easily. I know the scale of the iPhone market, combined with Apple's restrictions, are the only reason I have that choice.
People paint this whole situation as Epic fighting for the consumer, but really Epic is fighting for the interests of Epic alone. I know Android users don't get it becuase they may not have experienced it, but really Apple is adding loads of value here and taking that value away isn't automatically pro-consumer, even if associated with words like 'freedom' and 'competition'.
Edit: Another perspective on this is that as a developer who writes software for Android and iOS, iOS is a far, far superior experience. Things work more reliably, testing is easier because iOS is an OS whereas Android is really a family of operating systems - see how much things can change on Pixel vs Galaxy. Things are getting better over time especially with AndroidX and Jetpack, but the developer experience is still loads better on iOS.
If you're referring to developer as 'individual who writes software for iOS' Apple is far superior. If you're thinking of developer as 'financial entity that profits off software' then the 30% cut becomes more painful, but Apple justifies that by having a premium offering with customers who spend more on apps.