A strong ramp-up takes time to plan and implement. Especially in a large organization such as the TSA or U.S. Customs and Border Protection.
This could be (and likely was) as simple as a phone call from the powers that be, demanding that "you do this NOW or else". You do know that such things do happen in hierarchies, don't you?
I will grant that ramp down takes immense work, considering the head of CBP hired by Obama last year to reform the organization resigned after the Border Patrol Union went after him.
An indicator that planning took backseat to "decisiveness".