I'm glad they didn't and I hope PERS is used thoughtfully. It was going to be used on Tony Stark when the BD Iron Man was to be a DX, but to me, Tony Stark isn't a character where posing the eyes really adds anything to it, especially just a head on Iron Man where most folks would get the most use out of the Iron Man helmet.
Clown Joker is a great use of, Batman's pretty good with some of the action poses you could come up with, but something like say Dutch from Predator, to me just seems like extra cost and feature for not the best gain. Dutch's eyes are permanently posed and for any photo or pose I've done, I've never found myself wishing he had PERS, same with John Connor. Certain characters can benefit very much from it, but ones where it's really just kind of a neat addition, I'd rather save the money and also probably get a better sculpt because measured aren't taken to allow the seam for the PERS access.