I'm not sure if this is a result of importing from vBulletin, but the banned users list is unusable because it's filled with thousands of permanent bans and the temporary ones are mixed in. Almost always when a mod/admin wants to see who's banned it's a temporary ban because these are the members who will be back on the forum. Permanent bans are used for things like spammers and really bad members that will never be back. vBulletin would separate the banned users with the temporary ones on top, making them possible to see. XF doesn't seem to even allow you to sort the list by date end.