- To be able to fold away the track info stuff on the right hand side.
- To be able to temporarily disable the automation on any, or all, tracks
- To have a mixer of some kind available for viewing
- To have multiple envelopes visible on each track
- To be able to crossfade audio parts on one track
- To have an envelope for Time signature
those are just the ones I needed today, I'm sure others have their own Arrangement wishes.