And a disable custom BBCode in signatures feature (preferably per BBCode) is also something that is essential. It wasn't a default feature in vB and caused people to show all kinds of unwanted BBCode in signatures.
Basically, as far as I know, I can either allow or restrict signature lines based on user group. The problem I am having is some of my members have images in their siglines, some have really large images, videos..., some have really large text, etc etc. It would be nice if we were able to control these from the admin area.