Would it work better as an ablative hitpoint defense layer if when given conditions in DS those conditions stayed/ticked on your lifeforce bar until they ended or it depleted instead of following over to your HP bar when manually ending DS with lifeforce remaining?
Stunned/CC’d while in DS? End DS manually for a jury rigged stunbreak if you did not have a stun/CC already active on your normal HP bar.
Granted it does not fix the kittened one shot through DS in high end PVE content, but it might help a little bit in other content if you could pre preemptively flicker into DS long enough to absorb the CC+immob burst and then drop DS to immediately back out, without having to burn a long cool-down utility.
What you would give up while using this method is the ability to transfer/cure any conditions left ticking away at your life-force bar while your regular HP bar is active. If you didn’t do anything to refill life-force while DS recharged, of course you’d be out of luck then as well.