Some stewards say that it'd be useful to see this information on Special:MultiLock for the displayed accounts. Could we please have it? Thanks.
Exactly. When locking spambots I always check the main wiki of the accounts. For example, if it's a Brazilian IP range, I don't tick the boxes of ptwiki accounts as in most cases these are false positives - of course, I double check it, but it would save me a lot of work.
It would be useful if the main wiki of accounts - and maybe the wiki with the most edits? - could be added to the multilock function.
Personally I don't really get why it was removed from CentralAuth anyway. It couldn't hurt and was in fact even helpful.