Colby has the most entertaining wrestling style (might be an oxymoron). A lot of output with excellent cardio. And he's trying something different with his character. I don't like him personally, but the reactions he provokes from people - all the pearl clutching - brings me a lot of joy. I literally cannot wait for him to say something just to read the responses. Don't even care what he says, just like how mad everyone gets. And his willingness to ride this gimmick into the rocks despite all the enemies he's making is keeping me intrigued.
If you removed him from WW, Diaz would be all that's left and he's a jobber who gets wrecked by anyone good over there. Especially with Usman gone, too, WW would, once again, be a bottom tear division. Luque would be the only one both good and entertaining (as far as fight style goes) to hold the fort.