Agreed. The expression on his face kills that thing. Joker looks like he's bored to tears or got up on the wrong side of the bed but instead of taking it out on innocent people, he's just moping around. Hopefully, Prime 1 will hear the feedback and change it before its released but I doubt it.
...The sculpt is quite nice..probably the best sculpt from a commercial release. I say the paintwork and eyes need work. Probably what is making the figure look "flat" and "depressing".
Face sculpt and clothing look really good, but that sculpted hair is an absolute atrocity. Ruins the whole piece IMHO.. At 1:2 scale you have to go with real hair or don't even bother making it.