Yeah, all banners look direrent, but I like the stile, I think it looks cool, I like all the banners exept the last ones (other academy relations and off-topic).
DKm uses a different style, all banners look the same, the only difference is the character and the colors, witch is good too.
About the main banner...I agree it should say light duel academy somewhere, I think ace is about to change it.