As requested.
FYI
@Mrs. K , just the other night some 15 fully grown large fowl chickens here, including a couple of roos, piled into my large lodge (recommended for 8 LF). I had a good look because when shutting up I noticed the other 3 were practically empty. One of those others, designed for 6, had 3 roos and a cockerel in it. Another one had two broodies in the nest boxes. This sort of roosting pattern is not uncommon here, where the flock of nearly 30 have four Nestera coops (3 medium lodges, supposedly for 6, and 1 large, for 8) to roost in as they wish.
And I have been assured, in person, by an officer of the Animal and Plant Health Agency here (part of the Dept Environment, Food and Rural Affairs, who regulate the grading and marketing of eggs for sale to the general public), standing in front of the coops discussing this, that if there are sufficient spaces for the number of birds, and THEY CHOOSE to pile into one or another coop however much above the recommended holding capacity for said coop, it is absolutely fine on every welfare measure.
The standards, he assured me, especially the space allowances, are intended for birds who are confined, and who have no choice about where (and with whom) they roost. Fwiw, I find most of my flock prefer to snuggle up tight next to one another even when half the roost space is unoccupied. A bird roosting with space around them is generally a bird unpopular with the rest of the flock, or sick. And our longest nights in winter run from about 4pm to about 8am, so involves the same long times as yours.
So obviously I think the coop will be just fine for the number of birds Raubkatze has. I hope the run won't last long though, as even 1 bird will desolate that small boring space quite quickly.