in theory the set message works for live.slider and live.dial. In practice though if the set messages arrive too fast those objects put out values occasionally. This is due to their implementation in the Live undo history. I had some conversation about this with support a while ago. Unfortunately they don't consider this a a bug, but as a flawed behavior due to the implementation. So there are no fixes to be expected any time soon. The way i work around is not very elegant: closing a gate preceding the ui object and opening it after the value has been set.