I actually was typing up a similar response -- as a very basic example, if I'm playing and I see a ii-V coming up, that's communicating information about what scale I'm likely going to be choosing from to inform my playing. By just giving me tuples of data disconnected from key centers I'm losing all the harmonic information about a tune, which honestly is the most important information for me as a piano player.

The notation isn't just showing me what buttons to press and when -- that's almost the least important part of the notation. What it is showing me is how everything is moving in a tune, which allows me to make decisions inside of it, and I'm not sure a base-12 notation like this is even capable of expressing that.

It's totally understandable for a beginner to want to make something like this though, because that context of harmonic analysis doesn't really come into play until years later.