A couple of annoying things for me:
I would like all folder tracks to be narrow by default. Once I start track zooming, the folders are left out of the party for making them narrow - forcing a manual resize.
Tracks should be searchable. In use fx should be searchable. - I would like a project navigation and track details window to quickly navigate to a track/group/buss/fx. I think some other daws have something like that - it looks useful.
Really dislike the right click/popup fx window from yesteryear. The browser's look and mode of operation spoiled me. On that note, I would like to rearrange and edit the order/names of fx within the browser - not have to go to the plugin manager.
On the plugin manager note - I want it searchable both on the staging side and customized view side. When building these views form scratch, I can forget if I've placed the plug in my browser or not. Just a little indicator would be nice.
I would like a hot key to bring a floating popup of any channel strip I would like to tweak regardless of the window I'm working in. For instance being able to hit control/something? to bring the master fader in front would be helpful at times.
Effects management - I may just want to turn off all occurrences of a particular plugin for a while and easily turn them back on. Now we have to bypass all bins of this type or individually bypass. When I'm at the stage of rough mixing and maybe needing to add another recorded track, sometimes I need certain cpu hungry plugs off, while others can be left on and not effect latency.