GAM is still new. Just like when Biyuuden was new, it had a more elegant image. GAM has a sexy image. They haven't changed sexy for cute, like Biyuuden changed elegant for cute. Goto is also on the sexy/R&B-ish side now, and doesn't show signs of changing either.
But musically, GAM is weak. Starting off with a theme song for a popular movie (because of its legendarism, not because Aya was on it), and chosing their
greatest song (Shinkirou Romance) to be a b-side. First mistake. Then, Melodies came. I don't have anything against lesbianic kisses, or scenes in bed, but most girls do, in Japan at least. Aya still had a strong fanbase amongst teenage girls, and with Melodies PV UFA killed a big part of that fanbase, but earned a crazy-wota fanbase
. Lu Lu Lu, imo, sounds like a generic song, like most of the songs in their album too.
So, while I don't think that GAM is the new W or anything, I think they're pretty weak. They need their solo careers, and I haven't forgot about Aya's upcoming single x_x