I think that's a property of the piano though. If every note had an exact lining, it would seem to work better (unless you were very used to the old system).

I would still take more space on the page to represent the same amount of music which is also important.

Many people have tried to replace standard notation, over several hundred years, and no one has yet come up with a compelling alternative. So it's probably a very difficult task.

If you're really serious about proposing an alternative I would probably start by considering why other competing systems have failed.