I will release new version in 1-2 days. Not all cards will get speedup, but at least Hawaii and Polaris will.
Tahiti and Pitcairn are maxed out?
I would hope not since my 7970 is Tahiti and my 270x's are Pitcarin. Although I am pushing 302H/s on 2 R9 270x's. Only 200H/s on the 7970 though.