A fair comment, and I agree: Francona's 2 run lead made it easy to bring in the bullpen. Cora had a tie game, not so easy to take Porcello out.
But. Cora had already seen Porcello, who had a solid start, begin to unravel in the 5th and even more so in the 6th. It seems to me that, based on that alone, he should have been less patient with Porcello in the 7th. As it turns out, a good bullpen--not guaranteed--could have won that game because the Sox scored in the 9th. But Cora waited to long to bring them in.
Also. Kluber had a slow start, but was doing fine in the 5th and 6th innings and got the first guy out in the 7th. Yes, he had thrown 108 pitches, but Francona might have left him in--but did not.