The issue with the tray folder has been fixed. There’s still other causes for extended loading times. More information can be found here: Game hangs on loading
It takes forever for my game to load.
This problem occurs if you are connected to the Internet and have quite a few files in your Tray folder (houses and Sims). Exact reason is unknown.
Put Origin in offline Mode before starting the game and only go online if you really need the gallery.