Because scrolling is my arch-nemesis and a lot of us (myself included) have the screen real-estate to do the following (27" hi-res screens and all)…
I propose the ability to add a second Inspector column flanking the existing one so you can see twice the number of panels at once, and be able to select which panels show up in which column.
Or at the very least, just dedicate the second column as an inspector for the instrument on an Instrument Track, which currently acts as a nested set of inspector pop-outs and its behavior (non-pinnable currently) drives me insane.
There is precedent for this… even Logic Pro X has a ‘double-wide’ inspector section on the left side of the project window.