There are many many loose ends in the Warcraft lore, and often we pick them up later and run with them. What are the Knights of the Ebon Blade up to? Ahhhh… we’ll probably catch up with them eventually, when they’re doing something cool. (But not in Pandaria…)
Oh please, everyone knows the Knights of the Ebon Blade have spent every single day since Arthas’ defeat completely shitfaced drunk, and finally passed out some time around when the Avengers of Hyjal laid siege to Ragnaros the Firelord.