There has not been that many driver updates in that time..
Theres an article here that talks about the latest beta drivers almost fixing the micro stutter on a 7990 (7990 being two 7970's)
http://www.hardocp.com/article/2013/08/01/amd_catalyst_138_beta_frame_pacing_crossfire_driver/
Anyway, do your research on it.
I don't need to do research. I've owned many xfire setups, during the dark days and during the days now where xfire is a pleasure and not a chore.
Have owned 2x 1900XTX, 2x X1950XTX, 2x 2900XT, 2x 6950 and now using 2x7950. Never had it so good as we do now. The frame pacing drivers which you linked have fixed microstutter. Not almost, fixed completely on single screen.

Bit worried how xfire 7950s will pair with my 3570k @4.5ghz since bf4 is straining a lot on hardware now 