Couple of things. When I listened to the NTSB conference today, I heard that the crew did pass drug/alcohol testing, BUT were not required to as a function of the pilot licensing. They were still required to take the test, as part of landing in the US.
My take on this was that the test did take place, and it was negative for the crew.
The autothrottles were 'selected' or 'armed', but it was not known at this time if, due to other settings, if they were 'enabled'
I'm not sure what you mean about the 'spool up' required on final.
It is my understanding that according to FOQA procedures, when on landing idle, the pilot is required to momentarily spool up the engines near minima or for balked.