I'm not worried about liking this album, because I feel I will enjoy it a hell of a lot more than I did MTM. However, the fact that Chester doesn't scream much pisses me off. That's one of the key things that made me become a fan of LP in the first place.
Also, I hate auto tune on an anything, and if there is auto tune, or even vocal/layer distortion... I don't know how I feel about it. Chesters voice is too badass to distort with. There is no need for it.
EDIT: I am actually happy that Mike is "lead" singer on this one. I always considered Mike the lead vocalist, and then MTM fucked it up. Keep chester secondary, let him save his voice for some badass growls and shit.