Complex sentence: Whether or not he has control of what he is doing is not said, but there exists that possibility since, although technically they should be berserked, the entire team seem to be able to work together in Oozaru form, and refrain from attacking each other.
Split into simpler sentences: Whether or not he has control of what he is doing is not said. Although technically they should be berserked, the entire team seem to be able to work together in Oozaru form, and refrain from attacking each other.