We have long hemmed clothing that's not clipping the feet, you can see it in the side by side gifs. Why does this particular set of clothing clip our feet when it doesn't with other similar gear?

If they could rework the animation a bit... Not right now perhaps, but something for a later patch?

For those not not following the above, imagine you glued little virtual 'sticks' to your leg, foot, and your skirt. When you move your leg, the skirt will move with you differently based on where you put the sticks.

Imagine the clothing is a hologram, you see the clothing, but you can't touch it; but the 'sticks' can. If there's no 'sticks' on the foot (or they're too short) your clothing won't move with the foot properly. Instead it can go THROUGH the foot!

The weighting is kind of like saying 'from this point on the model, use this much 'stick to move this point on the other model'; and stronger weights have more impact on the model as they move.