I think the extra voltage throws off a lot of people.
They have to provide the extra voltage to make sure the additional 125 mhz is safe for all 7950s that went out. I also suspect the additional voltage includes room for the basic 100-125+mhz (I know some go higher) core increase thats been there for all HD 7800-7900 series.
Essentially there moving the bar/slider over for all 7950. A 7 month window since its release and just adding v0.05.
W1zzard didnt include overclockability this time but it might of brought more perspective.
If v0.05 increase is too much for you like some seam to sugguest in dramatic fashion there is always the option of undervolting on the new bios or a crazy idea dont use it.
I think AMD learned from the 7970 GHZ Edition roll-out and decided this is a smarter move. Just roll out the new 7950 off the line with the new adjusted core clock and just release a BIOS for the previous 7950s to bring them up to speed. Save time and money for both AMD and AIB partners. No need to spend extra cash on Marketing/Awareness and AIBs dont have to re-print there boxes and stickers for the cards. Much smarter move IMHO.