Interesting thread. You might find it works a bit better on a model with less volume to the limbs; giving you more room to spread falloffs.

Sorry you didn't think we did a good enough job with M4. I did experiment with secondary movements via handles at first with M4 but was concerned about added complexity.

Its always a toss up between the best it can be, vs complexity for the people who have to support it. We try to make a balance, because a lot of merchants depend on it, and ultimately easier to make clothing and support items probably relate to lower prices for users.