If you look at the linked comment thread, the suggestion (as I understand it!) is to, among other things, show people a list of keywords that they previously used for icons (in comments or entries) that are not attached to comments right now, and make it easy for them to reassign those keywords. I think the OP also would like to change the keyword management system so it's more like the tag management system -- less "just type in keywords on the editicons page", more "show lists and provide more details about keyword use".