All fair observations, particularly about the piano which I didn't want to have punch through too much of; nor become lost in; everything else, so I tried for a middle ground.

Faster progression, I somewhat agree: I recall being advised that one should get to the good bit within 30 to 60 seconds, but perhaps sooner rather than later is the better option?

As for more variations, I would say that I wanted to keep things fairly simple and consistent, although maybe I took the risk of being closer to the boundary of boring this time.

Whether or not the aspects you mentioned are a matter of taste, it's good to read what someone else thinks, as it keeps me on my toes a bit. Thank you :)