https://bugs.winehq.org/show_bug.cgi?id=34266
--- Comment #32 from Jeff MacLoue jeff@macloue.com --- (In reply to Andrew Church from comment #28)
Patch https://bugs.winehq.org/attachment.cgi?id=64452 from bug 26617 seems to fix the original FFXIV 2.0 benchmark (the game itself has dropped D3D9 support and is no longer affected by this bug), so you might give that a try.
Unfortunately no (visible) changes in The Witcher 2 with this patch.