Does carrying not result in a -1 to movement anymore? I can't see anything in the rulebook or PAC about this.

No, it doesn't.
TH prohibition again carrying is also no long a thing.

CARRY
Before beginning movement, you may choose one adjacent friendly character
of smaller size. Immediately after moving, place the chosen character adjacent
if possible and it can’t be given a non-FREE action this turn. To carry, neither
character can be holding an object or pick one up