Hey SHS, if you're unsure of whether something should be posted openly or not,
just put it in spoilers. The Mods don't always get around to every thread.
As for your idea - I think it's very interesting.
I seem to remember, and I'm sorry I can't remember the author or the title, a book about a character
where the world he lived in there were different forms or schools of magic and everybody specialized - but he, through various adventures ended up learning the different forms which paid off in the end.
Your idea is far more advanced and has a great deal of potential.
I know I'm borrowing this from another story but what about 'Wild Magic'. I seem to remember that it was naturally occurring magic as opposed to trained/controlled magic.