Dag fix is not included in this driver. My rx 470 suffers a huge hash decrease compared to blockchain driver.
I am not sure why they claim %15 increase in the offical release document. There are some cool gaming related features in there tho
1. DAG fix
IS included
2. Your RX480 suffer because you didn't care to read documentation and see that you have to switch from Graphics to Compute
3. They claim 15% increase in some GAMES
4. Yes, finally we don't need fraps and similar tools to see FPS and more in overlay, have performance log, change settings directly from game etc