Currently it seems that the approver only see the original and suggested changed value when someone is submitting an edit on an item. Wouldn't it be good idea to add an (optional) field where the person suggesting the change can fill a field for the approver to read before accepting/rejecting the change? That could be for example a source for picture, a reason for the name change, or anything else the editor could want to try to inform approver for. That kinds of fields are already implemented on most other online databases (for example MobyGames), as well as Wikipedia (in case of Wikipedia it's a public field, but I see no big reason for it to be public - it could be but don't have to - once an edit is approved it doesn't even have to be kept actually).
I just hope the idea wasn't suggested before, as I couldn't imagine what keyword to use when searching; if it is, then sorry about it