I think so too. A lot of clutter makes a huge difference. They need a place to retreat, bow to the queen by getting out of the way, and it is over. I have seen them come out 30 seconds later, stand right next to the queen and it is not a problem.
I think you are golden.
You might start with locking all the older birds where you have the younger bird, and put the younger birds where you have the older birds. Just keep them that way for a couple of days. This will give some territorial rights to the new space, and then let the others out close to dark. WHEN you...
I just have to laugh... you may as well have a new born baby! Up all night, but the reason I am laughing, is that is just what I did, so afraid they would be frozen in the morning. It might take a couple of nights of putting them in there, but it is magical when they crawl in there the first...
Turning off the light at night is what I do. Then listen. Cold chicks are madly peeping chicks, it should get nearly silent when they are in there. At first I had to push them in there, but then they just relax and get quiet. A broody hen is dark all night, I think it is good for them to have a...
For inside the coop, take a milk crate and place it upside down over the chicks the first night. During the day, elevate the crate a couple of inches on maybe bricks. Tape it or secure it to the bricks. This will allow a safe zone that the chicks can escape to, but the hen can not get them. Have...
I really liked the one way gate. I made a small pen out in the run, with a huddle box and two lattice panels. The first day the chicks stayed in the lattice panel, just enjoying the extra space. The old biddies, peaked their heads in to look around. Within a few days, the chicks were sneaking...