I still have yet to be asked to be changed over to the app. There's a window that keeps coming up now saying "later this year origin will be switching to the EA app" . Um, it's November, there's not much of the year left. Origin seems to be working at the moment so maybe it's happening in December?
I have experienced the game getting stuck on the loading screen and had to restart my computer a few times recently but not sure if that's Origin or my internet connection in general.