I think he was going to be in TCW, but was replaced in favour of Bane...
Durge was one element of the previous Clone Wars fiction that I really wish had made it into the Clone Wars TV show. (Although if it really had to be an either/or decision, I'm glad they went with Ventress, but there was definitely room for everyone's favorite Gen'Dai too)
I would have liked to have seen a more "grounded" depiction of him in action on-screen, as opposed to the hyper-stylized version we got in the Clone Wars shorts. He was definitely one of the best characters of the Republic comics.
That would look pretty cool. I think the benefit would be that he can punch you and cut you to ribbons at once.
Idea! Merge a Sith Lord Gen'Dai with the armor/weapons that Lord Nyx uses...Seems like it would work with their brutality/size. Not to mention an actual use for light sabers for them.