You can't always place a coop in the ideal location on your site,
and geographical location, as well as your sites micro-climate, can have can an affect on the solar gain aspect.
In your climate heat will probably be more of a problem than cold.
Sounds like you have good handle on how to adjust things.
Your idea to block morning sun is good, that the west sun is blocked by trees is excellent.
I wouldn't fret it too much, the front of your coop (or anyone's), does not have to face south.
Thank you, Aart!
Appreciate your feedback, as always.
Should I place the run a certain distance from the north wall of the coop so that (when I hang nylon) it will better provide them wind protection, or does it not matter if there's a greater distance between coop and run?