The "quality" aspect exists across every single platform that is free to access. Digital releases have lowered the bar for musicians to enter the market, which means finding objective and subjective quality is going to be harder.
Copyright (a moving target today) is an issue that hasn't been addressed on Musicoin yet, as far as I can see. I'm optimistic for its possibilities and would like to see one-step-at-a-time play out. Get the streaming running nicely, UX and build a content base.. move up from there......