But you're getting games from one source, why not another? Just curious.
IMO, its easier to install and remove games and apps installed from the App Store than it is from another source (i.e installing Steam), without having all that uninstall stuff left behind after you remove an external program.
Granted, I might not be using my Mac to it's potential this way, but for casual games, its fine for me.
And since I'm not really a PC/Mac gamer, I like to be able to remove apps quickly.
I'm more of a console gamer when it comes to gaming.