It's important to be able to delete your own feedback, especially a consent (e.g. if someone edits the proposal and you can no longer agree to it).
Hi qris, Nate/AlanHamish? wrote a really nice email a while back (or maybe it was an apticon thing - can't remember) about why econsensus needs improvement to support real decision making. I seem to not be able to remember who said it and when, but the point was this.
Concern & Consent are states
Other things are feedback
So you can have a long discussion about proposals with "comments / questions" and then change your state multiple times.
I think this would be better than allowing deleting feedback.
Perhaps that's another way to achieve this, I don't mind as long as one or other of these gets done quite quickly. I think deleting your own feedback is useful anyway (since you can edit it and remove all the text) and very easy to do compared to making consent into a state.