User blog comment:Accrepower/Some Champions are left behind./@comment-2248060-20130207154615

Nasus just got buffed and Rene was plaed in a recent tournament

Xerath however is ina bad place along with most bursty AP mids, the new health stacking meta has kinda screwed over bursters that don't have some sort of %health spell because the best counter to burst is health.

however these three are far from the least seen champions, Heimerdinger and Karma are up there, mostly because they are not part of the pool for the free champion rotation (partly due to their reworks)

And Diana was not the champion that made everyone think "Oh we need faster games" that goes to the growing assassin class of champions which Diana is a part of, but also champions like Talon, Akali, Rengar (thats what Riot wanted him to be, an assassin, not a tanky bruiser) ect. Assassin's have been around since the begining of the game, they are becoming more popular as AD midlaners (something Xerath, in theroy, should counter hard).