Still too bulky to fit ears/hair, etc (remember the Joker interrogation scene?!)....as would be the case with any prosthetic. You have to look past the stigma of 'CGI', and see how it's actually progressed with mocap and even further advancements in photo-realism. You could make it as thin as skin, virtually, and even shape out the extra space needed for ears et al...and not have a nearly suffocating, painfully tight wrap on the actor's head. You could also have the 'frown' change/react a bit, much more easily incorporate 'white eyes' if wanted. It might not be for this immediate version, but a few years down the road, it be almost irresponsible not to at east pursue the possibilities. It takes the right artist/filmmaker who can work closely with animation and effects to hone it.