Well, there are just too many evidences that seems to point that Setrab is actually a Dharma Protector that is fully enlightened while manifesting in a worldly form. Yes, worldly Dharma Protector are worshiped in Gelug tradition but generally frown upon. I am not familiar with Camseng but I do know that Sera May propitiate Teu, an unenlightened Protector with a top hat. The image of the statue is only carried into the monastery for pujas and escorted out after pujas.
On the other hand, Setrab was actually the Protector of Tulku Drakpa Gyeltsen. Hence, when the spirit of Tulku Drakpa Gyeltsen assumed the form of Dorje Shugden, widespread disasters, diseases, spirits, deaths and so forth broke out all over Lhasa. The blame was pinned solely on the spirit of the deceased Lama. The Dalai Lama eventually contracted some Nyingma Lamas to destroy the spirit with powerful fire rituals. It was said that Dorje Shugden was rescued on several occasions by Setrab.
Now, if Setrab was unenlightened, how could he rescue Dorje Shugden and like someone mentioned if he was unenlightened, why would Dorje Shugden have him reside on the floor above him. These points seemed to point to the fact that Setrab must be more than meets the eye and must definitely possess an enlightened mind.