I pretty much 100% agree with it. Except the 5 floors rule. Paris or Vienna are 7-8 floors. Upper manhattan is 10-12. And these do not feel particularly oppressive.

Tokyo is another interesting type of urbanism. You have very large avenues delimiting blocks. The blocks can either be residential, in which case you walk in what feels like a quiet little village with its narrow streets. Or they can be "entertainment", with a dense web of noisy bars, restaurants and game arcades, lots of light and people.

I agree that the 5 floor rule doesn't make sense all the time, though the limits used should be linked to the width of the streets. I believe it's good to make sure sunlight can reach every window for at least part of the day, though there's a certain charm to some narrow side streets too.