I would remove the very top roost and possibly the second highest roost. Or at least lower the second roost.Apologies, but what do you mean by carboard baffles?
Also, do the roots need to be lower then the side vets so drafts don effect them while roosting at night?
Cardboard baffles are just pieces of cardboard you would cut out, fold over the ends and staple them inside the coop up high near the vents to divert any blowing wind that's coming inside the coop towards the roof so it doesn't blow down on the birds.