Right now, bones can move totally freely, until they hit their angle limit, where they stop suddenly. It would be nice if a falloff curve could be defined, so that attempting to move a bone further towards its angle limit would actually cause it to move less and less, as though you were pulling it into cushioning which is resisting more and more strongly the more compressed it is.

So, in practice, you would have to move your hand to something like the limit, in order for the limit to finally be reached (but moving around closer to the rest angle would look almost normal, because the resistance is smaller there).

Actually, it would also be nice if this could apply to stretch/squish as well.