Nice job!
You've got your ventilation in the right place, though I'm not sure you have enough of it. Here in the Steamy Southeast I find that I have to have at least double or triple the usual recommendation of 1 square foot per adult, standard-sized hen in order to keep the coop under 100F on a 90F day. The best way to check that is to put a thermometer in right where the chickens are. If it's the same temperature and humidity inside as it is outside then you're good.
I'm also a little concerned that your roof won't protect those vents when you get blowing rain. You might want to create some kind of awning for them.
There is a difference between Deep Litter, a moist, actively composting system, and Deep Bedding, a dry system. In a coop on a wood floor the latter is more practical because the composting action in Deep Litter would eat the floor. Both are fine in any weather because it's a very rare chicken coop that achieves hot compost and cold composting won't overheat the chickens.
Here is my article on Deep Bedding:
https://www.backyardchickens.com/articles/using-deep-bedding-in-a-small-coop.76343/
Also my articles on hot climate chicken-keeping and coop ventilation:
https://www.backyardchickens.com/articles/hot-climate-chicken-housing-and-care.77263/
https://www.backyardchickens.com/articles/repecka-illustrates-coop-ventilation.77659/
As for your actual question,
As long as you have around 8 feet of roost, as long as the roosts are above the height of the nests so the birds don't sleep in the nests, and as long as there is enough horizontal distance between the roost and the wall so that the birds can fly up and down (they fly at about a 45-degree angle), it doesn't matter what orientation the roosts are in.
There are advantages to having one long roost in the middle or off to one side -- especially when you're getting in there to clean. There are advantages to having several roosts -- allowing the flock to separate by age group and/or friendship groups.