I know "It works fine for me" posts doesn't mean much, but... the EA App have worked fine for me on Windows, the only issue I am having is that the app requires me to log in and doesn't remember my account when I'm in offline mode so I have to log in every time I want to play in offline mode but that's a small thing for me to live with so I can still play the game without having to update.
Apart from that, the app runs well, it doesn't require a lot of resources and it is much better designed in my opinion. I was able to transition from Origin to the EA App without having to update The Sims 4, I can turn off automatic updates and play the game in offline mode and the client works great with game pass or steam if you use any of those services.
