I would reconsider the placement of the roosts relative to the human door. It looks to me that you'll basically be walking right into roosts and that any access to the far end will be impeded by the roosts.
I would probably put a single long roost the whole width of the coop now.
Personally, if space allows, I would prefer that my birds not have to walk under the roost (and potentially through any poop underneath them) to reach the nest boxes. It makes for cleaner eggs. Since the plan is now for a walk-in coop, I too would eliminate the trays and install a poop board under the roost. It does a couple things. Firstly, it contains the poop for easy removal. Secondly, if constructed with a sturdy front lip, it gives the birds an intermediate height to hop up to when they go to roost. Lastly, with the majority of the poop contained and a clear line from the pop door to the nest box, eggs will not be dirtied by poopy feet.
I would probably put a single long roost the whole width of the coop now.
Personally, if space allows, I would prefer that my birds not have to walk under the roost (and potentially through any poop underneath them) to reach the nest boxes. It makes for cleaner eggs. Since the plan is now for a walk-in coop, I too would eliminate the trays and install a poop board under the roost. It does a couple things. Firstly, it contains the poop for easy removal. Secondly, if constructed with a sturdy front lip, it gives the birds an intermediate height to hop up to when they go to roost. Lastly, with the majority of the poop contained and a clear line from the pop door to the nest box, eggs will not be dirtied by poopy feet.