Does Freezing Broccoli Dry it Out?
According to Cargo Handbook (emphasis added):


  Broccoli is not sensitive to chilling temperatures and should be stored as cold as possible without freezing. When freezing injured, thawed buds will be very dark and translucent, and can later turn brown or may serve as sites for development of bacterial decay.


Note that they are describing how to store and ship broccoli which is intended to be consumed fresh.

To freeze broccoli for preservation, it is blanched first.