Wiping cashe partition helped a lot for me. It's still not as good as the previous official firmware but it's much better than when I first was running the beta FW.
Power off watch. Power on watch while holding both side buttons at the the same time. When you see "Samsung" with "rebooting...." under it, quickly tap the upper button (power button) 3x. Once menu appears, navigate with power button to "Recovery" (highlighted in blue) then press and hold power button. Now in recovery, navigate with bottom button to "Wipe cashe partition". Press power button. Navigate to "Yes" and press power button.
