Jose,
Thanks for an interesting read.
You seem to imply that the Thermodynamic Law of Entropy is the result of the expansion of the universe. I have sometimes thought this myself. You also seem willing to abandon the "arrow of time". If so, you might find my essay to be of interest.
I am not clear as to why there are emergent properties and why time and a large scale causes them to be. This seems to be a shared line of thinking presented in several of this batch of essays, but it is not clear to me why it should be the case.
I was not aware of the factor of 20 increase in velocity that you mention regarding velocity for each of the cosmic structures. That does place an upper limit on the structures that are available. I definitely agree that "free will" and choice are only meaningful concepts if there are more than a few available options. Therefore, your emphasis upon medium sized structures is correct I think.
Best Regards and Good Luck,
Gary Simpson