I'd say that a very large portion of games, that come to market, are almost 100% copies of other games. The whole industry is copying ideas from everyone else. So, yes, an ai is perfect for the job. You need to launch faster than ever, you need to iterate faster than ever, and a machine, that can produce games 24/7 is the wet dream of every game studio. Of course the games will be shit, but the most successful ones already are, just look at the charts in the (mobile) app stores.