Hi!!!
No, you are totally ok. When it comes to waddles and combs, the males devlop faster and are cherry red. The females (depending on the breed - how fast and red) combs usually take wayyy longer and are not at all as big or a red. I have almost 4 month old amerucanas and their combs are still pretty small. You are fine. As for dryness, thats is normally ok too. But if you want, rub a little shea butter or any kind of oil (olive, coconut, avacado, jojoba ect) on them to re-hydrate them. Thats what i do whenever my girls look a little chapped!
You have beautiful ladies, however, if you are anything like me, you won't have just have 3 for too long- you can never have too many chickens!
Oh, and I have the same coop, lol. It is the best coop on the market that I have found. I am getting another in a few months!
Happy chickening!!!