Actually AA is reducing their summer schedule at JFK during the construction. The carriers were all forced to do so by the FAA.
Normally carriers would be ramping up service at the end of March for their summer schedules. They will not be permitted to do so this year until the construction is complete. Carriers are pretty much forced to operate on their winter schedules throughout the period and those schedules are lighter than the summer ones.
I do have a flight out of JFK on B6 late Friday night and I'm looking forward to some quality time in T5 waiting out the delay.
