No, you don't have to keep playing the same map in Star Wars Battlefront, you actually have the option to choose the map you want to play on. The map selection area is easy to miss, going to the multiplayer menu shows you all the different modes, maximum number of players and whether Heroes/Villains are available, but there is no map selection.
If you want to select which map to play on, simply hover over tiles in the multiplayer menu and look towards the bottom bar on the screen. 'Choose Map' will light up when any of the tiles are activated, when you see it hit Square on the PlayStation 4's DualShock 4 or X on the Xbox One's controller.
You know what to do after that.
Hopefully, your experience with Star Wars Battlefront has been good so far, 'cause EA and DICE are definitely planning on making sequels for it.