I think I'm in the minority here, but I'd love to see Class Acts go away. I usually find one, at most two of the classes articles in each issue worthwhile. The overabundance of flaws articles have really been the biggest waste. How can so much space be devoted to a variant rule from Unearthed Arcana, while epic, psionics, and Oriental Adventures are virtually ignored?
Winning Races has, on the other hand, been a delightful surprise. When I first heard about it, I groaned, thinking "gee, we need another playable race like a hole in the head". But seeing the grippli and lupins converted to 3E has made it more than worthwhile. This month's was a bust, though. I have no interest in Savage Species-style class progressions.