So new interior redesign. Nesting boxes external and are 18"w×16"h×16"d, roosts and poop boards going across allowing for 2x 4' roosts. 7 sq ft of vents along back and two side vents. Both sides will have doors for daylight time warm weather ventilation. I as a fully grown adult can fit in it for cleaning.
For 6 hens.
That looks better.

Those access doors on both ends will make your life much easier.