if two coops are available what are the odds my flock (pics of coop)

will split and use both? will they try to cram in one? i have 3 buff orpington pullets (4 monthish) and 3 bantams (2 hens and a rooster) and am getting 2 blue orpingtons in 3 weeks (will be 2 months old). my current coop will not hold this number of chickens. I have to put the coops in the same enclosure to provide protection at night.

they currently tend to hang with their own breed and there's no interaction between the orpingtons and the bantams. its odd my previous flock intermingled, but these seem to have lines drawn in the sand.

if i devote my current coop to the orpingtons and build something quick and small for the bantams (and cheap) what are the odds they'll split and roost seperately? i can physically move them at first to train the bantams to the new coop if need be.

i don't want them to cram into one as they'll get too hot and id like to prevent any aggression due to overcrowding.

its possible i could expand my current coop which would solve the problem but i'm not sure i'm willing to try and would have to get a friend out to help me.

also, if by chance one of the blues ends up a rooster, is this much too small of a flock for him and the bantam rooster to coexist?