Reminds me a bit about how Mark Twain would redesign English spelling. Once you've read sheet music for a while and played it you don't really see it any more, you hear it in your head and you play it. I'm sure there are many different ways you could write it but they all suffer from the same challenge, which is is first training your brain to read it.
Given the amount of information on a page though, you would have to at least match that, otherwise you spend to much time flipping pages and not as much time playing.
I realize you're trolling but you might consider that thought a bit more carefully. In particular 'notation for beginners' is simply one instance of "<x> for beginners" which, doesn't scale to "non beginners". I have had a lot of UI's foisted upon me with the admonition "Its really easy for beginners to come up to speed!" and often it is, but as they get up to speed their ability becomes hampered by the design which doesn't support "non beginners".
It isn't surprising, the first time anyone tries to master something a bit more complicated their initial thought is "this is soo confusing! Why doesn't someone design something easier to learn!" and for the motivated ones they may follow through.
The problem is then that they have mastered their "easy" thing and now their trying to do more complex things, or in this case describe more complex music, and wham, suddenly they just can't seem to make it work. But had they actually mastered music notation first they would have mastered a system that has successfully expressed a wide variety of music, styles, and levels of complexity. So they wouldn't end up stopping in the middle of their "progression" to go back and learn a new system because their old system pooped out on them.
Given the amount of information on a page though, you would have to at least match that, otherwise you spend to much time flipping pages and not as much time playing.