Uh, no. Badspot spent years on this game, and if he got a new engine, he'd have to first spend the money on it (Probably at least $100, probably more, and it'd have to be a commercial license), and then completely recreate Blockland. As far as I know, I think he's happy with the amazing game he's managed to create so far.
"Advantage no noob ice cream?" A new engine wouldn't change a thing in terms of noobs, if anything it might attract more...