The books have done a tremendous job lately of taking stereotypical or one-note alien races from the shows and fleshing them out. I wouldn't mind seeing a novel take on the Kazon. (Novel... do you get it!? HAHA I'm so clever.)
I think I'm one of the few people he liked the concept behind the Kazon (the entire streetgang-inspired thing). It wasn't perfectly fleshed out, but I still liked them. So yeah, a novel where the Kazon feature a bit more prominent could be quite nice. Who knows, with Voyager back in the DQ....