Yeah but it's also been far more explored than the NSW era. A war between the Jedi and Sith that had been waged for a thousand years and consumed the galaxy would have molded the Jedi and Sith into their most Jedi-on-Sith combat oriented incarnations in history and their numbers would have consisted of individuals who had been tested in that type of warfare and who would have possessed more of that same type of experience than those of the orders of almost any other time period. The BoD existed during the height of that war.
Somebody like Qordis unfortunately hasn't demonstrated much but the fact that he was one of the higher ups of the order speaks volumes. Sith respect power (to the Sith of those times power meant combat prowess against Jedi specifically) and it's clear that they wouldn't put somebody who was anything remotely unexceptional in such a position.
Bane is described as tearing through his Force defences as if they weren't even there.