It would be interesting if four QBs had already gone because there is no consensus as to which is best. If we took a fifth, we would be saying that the other four teams didn't know what they were doing. Perhaps we should be grateful that the Jets aren't #1 because you KNOW we would pick the wrong guy, and then sit him for a couple of years behind 'veteran' QBs. If the guy isn't ready to start the Jets are hopeless at developing talent. Barkley would be stuffed in the backfield unless we fix our O-line, with a better line you would see more from McGuire.
To answer the OP, if four have gone I would trade down, take our developmental QB then, and use the other picks on O-line, but we say 'trade down' every year and the Jets always stay in their assigned slot.