I'd like it if you could create a template for a type of game, but with the ability to assign more than one map to it.

I envision a pop-up would appear after selecting your template, asking which of your previously selected maps you'd like to play on. Or perhaps just a seperate page asking you for it.

This way, you can select between those different maps without having to go through the hassle of using the customize menus, which tend to lag and get bothersome if you make alot of games.