I like the Cawdor heads; they evoke more of the old-style minis, with the face masks and hoods. I'm now hoping for bodies that bring back the old Cawdor aesthetic, to round it off (I have a feeling that cries of "why can't we have old-style Cawdor minis" has filtered through in some manner).
Most of the heads across the gangs look atrocious on first viewing, but I get that:
Some of them are meant to model head/eye injuries with bionic replacements, which is nice, I guess.
A lot of the new heads have gas masks, particularly Goliath (11/13 heads!); this is probably because people can pick up gas masks pretty easy and/or need to buy them when playing against Escher gangs.
They're not painted, and when on the bodies some of the heads look better (even unpainted), so perhaps they need a paint job.
The Orlock gas mask heads should have, I think, been more in line with the Van Saar heads (and I'd consider buying VS gas mask heads for an Orlock gang).
I can't help but think of the third party heads that look a lot like these heads already, though.