This interview Steve did (https://youtu.be/BjvrHOARC00) to explain the mindset behind intelligibility of sounds is one of the most useful things I've heard. Before this, I always thought in terms of addiction (" what else can I add ?") But this small yet important insight makes you think about what you're putting in an arrangement.
Steve, if you see this thread - I think people would absolutely love a series of videos where concepts like these were explained.