Two strokes? Maybe, but for 250cc single cylinder liquid cooled four stroke engines, the CBR250R is as good as it has ever been 
Agree with you there, the supersports class is pretty well defined as the 600CC race replica class of bikes with some minor exceptions usually given for things like the GSXR750, Ninja 636, and the Ducati 848 superbike.Honda actually market this bike as a "Super Sports" bike, which it most definitely isn't in my opinion.