True true, but I find it works equally well if not better if contemporary stuff. Don't ask me though, I'm not a specialist composer, I just do it from time to time. The man to speak to about new notation is Rob Newton (aka Curiosity Kills) ... he does some really wacky stuff with his work!
why would you give them a glossary? from my (admittedly EXTREMELY limited) experience it's all about how the players interpret what is put in front of them. Which is why you need very good players who can think musical ideas in their head and transfer that directly to their instrument (ie. not me)