The slowdown in hirring was planned before the big surge of 100 - 150/month started last fall. Actually, from crew resources standpoint the high throughput in q4 and q1 was a surge to cover summer flying, and they are now returning to a more normal capacity. They were actually planning on going to around 60 pilots per month, but determined they need closer to 80. I believe they said they will ramp up again in the fall.
So fear not, this is not a new development nor does it portend a demise in near term hiring.