I'm not playing an imperial, but when the change went in so that healing curse did damage, my main issue was this:

a) It was designed to stop it being used repeatedly on slept people. Fine, although personally I think insects should work similarly.
b) The fact it does damage when you are already in combat means that it tips off people as to what you are trying to do. That's the bit I'd like to see change, if at all possible.

Summary: Healing curse damage on a slept person, no damage on an awake person. Reasonable?