I have a 7970 GHz and 280x in crossfire. I just upgraded to the new 15.11 driver with the new UI. I setup a profile for Battlefront and tried each crossfire option.
Default mode - game crashes
AFR friendly - game loads but when I load a match the screen is black
1x1 - same as AFR
Use predefined profile - I select the starwarsbattlefront.exe and game crashes
I have to completely disable crossfire to get Battlefront working. I'm able to use crossfire in every other game. I also tried the 15.11 and 15.11.1 beta drivers with the same results.