comparing v43 vs. v44 for my gtx750(non-ti) (windows binaries from github)
x15: 1966 vs 1976
x13: 2272 vs 2270
x11: 2886 vs 2883
quark: 5700 vs 5660
qubit: 4418 vs 4419 (with drops)
lyra: 882 vs 881
So, only x15 gain for me
Try to reduce the launchbound in Shabal from 320 to 256. If you have time revert some of the change sets to find the one that slows down.