Battlefield 4 is a forgiving game to test on and lets the cards stretch a little. However, at 1080p the overall performance is worse with the newest driver.
This is starting to become a running theme with 1-3 FPS being the average performance drop across all of the cards. The only card seemingly benefitting from this new driver is the R9 380.
Again, an overall drop in performance. The R9 390X gets a negligible increase of .3FPS.