If there is one thing I believe would really assist longform editors using Premiere Pro, it would be re-imagining label colours from the ground up. Please, please learn something from Avid Media Composer. Any clip can be assigned any colour from a full palette range - both within the bin (and reflected on the timeline) or just locally on the sequence. A lot of longform editors like myself, especially in documentary organise a whole project using colour labels for contributors, scenes, cameras - and is fundaamentally how I navigate a timeline speedily. Having a predetermined amount of colours per project that Premiere currently has just comes nowhere near being usable.