It would be great to have the option to move buses freely or to "lock" them into the bus pane as is. I like to have all main instrument buses (drums, guitars, vocals, etc.) organized to the left of the master bus, then all effects buses on the right of the master channel, so for the most part Sonar's structure works for me. However, as mentioned earlier, when doing parallel processing on channels, it would be so nice to put that right next to the track being processed instead of cluttering up the bus pane. One option would be to clone a track, apply the effects, then adjust the volume of that track to get the parallel processing chain, but using a send level is (in my opinion) a little more efficient and doesn't require track grouping once the desired dry/processed balance has been set.