Doesn't refresh actions, effect just switches to your unit after they die.
This is because currently when you have a dracolich you never actually kill other units, they are always converted instead. This needs to be stated in the dracolich description or changes, we will do something to make it more clear.
does units gain murdered status by "killing" with draco?
Yes now as described in the draco's description all killings are real and trigger effects (murder status, conspirators, etc.)