Quote (Blind[zF] @ 8 Mar 2012 17:59)
The old design was cluttered, and was nowhere near as clean as the new one. The old IM I believe only had the top 32 as well. This new IM has all of the old features, as well as new ones. If this isn't about a bug anymore, you should follow the link Protagonist gave you and make a site suggestion.
The old had them all, but it was a design decision to remove that from the new version for a number of reasons. I have no plans to change that at this time. Even stand alone IMs have hard limits on the maximum number of buddies you can have in your list. You can still /msg any user that is online, however, and get a status of a user (if they are on or not) by typing /whois USERNAME