Going to push back a bit. This reads less like ultralight failing and more like the specific 2kg you cut being the wrong 2kg.
Torso pad and no sit pad are the two cuts that consistently ruin people, and both have light fixes that do not put you back at 6. A full length pad with a decent R value is maybe 200g over the cut down one. A sit pad is 30g. You could have kept most of the saving and fixed both complaints.