Connor's a different situation than the Joker. Sloppy paint apps were done and before mass shipments went out, they were called on it and it was reasonable for them to fix, odds are, if everything had shipped out and it wasn't for some time that they heard about dissatisfaction, we'd have not seen something done. Joker's a cash cow, I think TDK probably sells to a larger overall audience than Aliens so it's in there interest to keep releasing.
HT acknowledged hearing us, some minor corrections were made on the figure, if they cared enough to really overhaul it, they would have done that instead of small fixes. I'd be VERY surprised if they release a newly sculpted Big Chap, they might do some goofy paint variant like Aliens, but I dont' see a brand new and better figure coming.