Okay, so now that limited resources have been implemented it'd be nice for a new slider to be added, but one that doesn't drastically effect gameplay in a negative way.
Carnivore: 2x meat gain from animals. 2x increased hunger recovery when a meat product is eaten. Decreased chance of successfully harvesting fruit or nuts from trees.
Herbivore: 2x fruit and nut gain from trees. 3x increased hunger recovery when fruit and nuts are eaten. Decreased chance of successfully gaining meat when butchering animals.