Maybe I'm a freak but almost all of the proposed "improvements" in this article I find distracting, annoying, and would turn me off of ever using the feature. I do NOT want my notes or content dancing around on the screen or having motion displayed because its evaluating equations or statements while I'm writing them. It's also why I disable most autocomplete and warnings in code editors. I don't complaints about syntax errors for lines I haven't finished writing.
Like, why would I care about the value of `a` before I've finished writing the equation? Sometimes a tool just shutting the hell up is a good thing.