1. Change for the tabs could be taken from KMail and Konqueror where it is possible to hide the tabbar if there is only one tab shown. I know some people who does not use groups so they have only one tab [All Torrents] shown all the times and it could be nice to have it hided if there is only one tab (or just get it from settings and View menu hided like on KMail)

2. The bottom buttons (Queue Manager, Magnet, Status, etc) should be possible to hide as well from the View menu. This would allow user to first minimize the bottom panel and then hide the bottom buttons so it would not be shown.

Both of these would allow to configure KTorrent act like very simple Torrent client for people who does not need anything fancier than just stop/pause/start buttons to menubar.