I was upgraded from Lagoon view to Theme Park View, which is probably why I got a dormer. I loved the dormer though. No noise above me and the higher floor gave me a lovely, sweeping view. It was amazing.
From what I could tell, pretty much any water view room in Boca Chica can see the castle. Someone can correct me if I am wrong.
The dormers are on the upper most floor. The enclosed balcony did not bother me in the lest. Because we were higher up, the views were perfect anyway.
The dormer rooms are a little smaller than the other rooms, which is why other people did not seem to want them, but they certainly were not small and we were comfortable there.