There are new beta Cats (13.8b2 - Win 7/8 64-bit DL
here, other OS you're on your own) which claim to have FF XIV optimizations done. 13.8b1 also caused the game to crash repeatedly during phase 4, so hopefully that's been fixed as well.
I don't have before and after scores in the benchmark. I tried to get them but my PC was all messed up from the weekend, and I scored 6900 with b1 and 6700 with b2, both of which were absurdly low for my hardware and settings. So I rebooted and scored 10070 with b2, which is considerably higher than I'd ever seen before. YMMV.