Same thing happened last week, allies had 2 v 1 odds and all were in GV's at 12 or gettign vulched, donno why.
I dont, on balance week to week, find either side has a great advantage in equipment. Sure, one week might tip allied, next week might tip axis, but pretty much they seem even to me.
The only set I have played so far that I thought seemed way out of balance was Hungary, Allies had the two best turning planes, and the fastest, and the best climbing with the La7 and Yak 9. Funny thing is if you check the stats that week they are nearly even despite the Allied advantage in hardware.
I think WAAAAAAAAAAAAAAAAAAAAAAAAY too much is made of "Uber" plane this, "Uber" plane that. To paraphrase Squire and Sakai:
Screw balance. Pick a time period, a theater, fill the planeset with planes that fit, and fly, everything else will settle itself out.