I agree entirely, I flew in from JFK yesterday at around 7:30am and it was ridiculous. 2 desk staff, iris and e-gates both shut an consequently a huge queue. They finally opened the e-gates (which are far less reliable than iris in my experience) but after I was most of the way to the desk and then put one more officer on the desks.
It always amazes me that passport controllers are consistently surprised by the arrival of aircraft at an airport!