Have you seen the homebrew epic feat improvement? A-V are here and W-Z are here
What do you think of those? They definitely give martial characters a boost; how would you handle epic if those fixes were in place?
Also, in any case, I don't think the Bez-Kismet really deserves epic bonus feats only every four levels - full casters get their epic bonus feats every three levels, so I've always been of the opinion that martial characters and partial casters should get their epic bonus feats at least as often.