Which is why I was thinking with their statement of making the combos/combat more aerial, the enemies would also be made more around aerial combat, forcing you to somewhat constantly have to angel/demon evade in midair, Angel pulling, enemy stepping, and Gliding around from enemy to enemy, etc in the later levels.
But that'd probably be much tougher to implement then to dream up, and with how ground oriented the demon weapons are...
Maybe the problem isn't having no other weapons though, so much as possibly not having anything especially awesome about the weapons currently, like doing Beowulf/Gilgamesh's Real Impact. But then, maybe it's in the upgrades is where they will really shine...