doesnt really solve your problem any but..
have you logged in since the reformat and experienced any difference in quality/performance? i got really low benchmark scores myself and am able to play fine. seems that benchmark is sometimes a little biased, some machines that are generally accepted as being equal in terms of quality/performance occasionally get drastically different scores.
are you using a nvidia gpu? i dont know about the technical side of it but is it possible that the new drivers they released to help ffxiv performance are affecting benchmark scores? *shrug*
This one time at FFXIV camp I tried to get a 3 person party going, but just ended up as a Disciple of the Hand.