I'd love to be able to work on the projects I've been working on for months now without sonar immediately crashing. That would be great. So far.... No dice.

I want Ripple Edit. Nested Folders in Track View would be cool. I also would like Regions. For example: It would be cool to select time in the Time Line, make it a Region, then add a Marker (which would actually be two markers, one at the beginning, one at the end, with a single click. I suppose the act of creating a Region would just do this automatically.

It would be good to have variable sizes  on faders and vu-meters

An interactive routing diagram.....  much like the node editor in Blender (for those who know Blender)

Better PRV controller editing when you've got multiple controllers per track

Different Marker types

Ripple Editing.
ACT / MIDI communication improvement  / hire Aslowe to do it.
Nr. 4 from Bob's list.
 

chord track!

Pro Channel needs a VU meter plug in.

Ability to slide a video forward or backward without having to insert time code offsets...

dont add more junk;(please) just make a better DAW;variable sizes  on faders and vu-meters; deeper and well defined colors; a better ruler\markers with colors...(please?)

panup
1) Delete hole safely in a complex project.

 
This. In spades.