The other issue here would be can you log ICUS WITHOUT holding the minimum requirements to be a captain?? I was of the understanding that to log ICUS you had to meet all the requirements and experience (Legal and Company) before you could log ICUS as you are "In Command" so to speak. Similarly if you were going to build ICUS with non check and training pilots around can you do that from the RHS???
Just because QF do it at the moment doesn't necessarily mean that it's legal. Would be an interesting one if it went to court or challenged by CASA.