it is just custom pose, with added assets, heels. until they are possible in game itself, other then eyecandy, not worth it?, depends, maybe
The game expects the model feet to be on the ground. The current shoes do not move the model feet in any way.
Proper fitting of heels requires to rotate and to compress toes, rotate ankles and knees, and requires the rest of the posture to shift to accommodate. This is specific to each model of heel.
The current solution is to use a custom pose that makes the model look good; this is very clunky and not user friendly.
I suggested several ways to improve clothing moddability, and a data driven solution for heels. Haven't heard anything back, so this is likely as far as I will go on clothing for now.
-T-