Not claiming credit for this, but picking up on a comment on one of the DE/Non-DE threads and I'm sure I can remember it being suggested before.
Similar to the "did you find this review useful" have a click against every post only to mark a positive attribute against the posters name for that post.
An index would be accumulated against that member as to how useful their contributions were.
You would have to be logged on to be able to click and you would only be able to click once against a post.
Is this a viable alternative to the DE status ?