Brille, I used your png image to create a song from scratch. It's definitely an improvement. Thanks for doing this. How did you generate it? Did you already have a template?
I understand the idea of bar-related tempo changes for simulating more realistic performance.
It seems to me that some of the more complicated chord variations emphasize one note of the chord with one style, but a different note with another style or a different beat in the measure. Makes it hard for a relative novice (like me) to predict what it's going to sound like.