Colour label tracks
As well as displaying user-configurable labels, one should be able to colour-code the backgrounds of each track including the headers.
Agreed - I work for a company that uses lots of freelancers, many of whom apply filters to their audio tracks. When another editor picks up work on their project, it makes it very time consuming to do even simple changes because of the filters. Being able to color code audio tracks would make passing projects between editors much easier.