Actually they should have canned Scott Caan and split the money between the two.  I don't see why they keep Caan around.  Lately his character has been nothing but a whiner.  DDK and GP should at least make as much as Caan.  That's the problem, the producers are overpaying for a 2nd rate actor (Caan).  The guy doesn't want to be here, he said so in his interviews not long after the show started.   Can him and bring back the Asians.  

Or maybe that was the plan from the beginning.  Masi Oka left so after this there won't be any Asian regulars.    At the end of last season Kono was off going after human traffickers and Chin Ho was offered a job on the mainland.   I think they already intended to get rid of the two.