I’d like to strongly suggest reconsidering this.
Nobody wants a Plex player that’s consistent across apps. This is a weird thing that many apps do, because it feels good to the product managers.
We all want a Plex app that feels “normal” on our devices. I want a Plex app that feels normal on Roku, one that feels normal on Apple TV, one that feels normal on iOS.
Consistency between Plex apps is only barely important on the home screen and when browsing.
Consistency in the player, so that Plex feels the same on different platforms, is not important at all. As others have said, that means the player experience will be compromised on every platform, for the sake of consistency nobody outside Plex wants.
It’s 1000% more important that it look/feel/behave like the normal player experience for that platform.