I had a chance to review both the Wayne/Hobbs play and the Caldwell play.
Wayne heads toward the back pylon and expects the ball over his shoulder but sees the ball coming short and along the sideline. Wayne seems to slow down to turn back toward the ball and has to alter his route as the ball is coming in at a different angle than he expected.
Hobbs is closer than I remembered and raises his left arm at the last second and the ball hits the back of his arm and the ball bounds away. At that point Wayne had actually turned himself all the way around and was now facing the goalline and getting in position to try to adjust to the pass which will end up being low and outside (on the sideline side of the endzone).
After watching the replay in slow motion about 10 times from 5 angles, Wayne and Hobbs end up very close to each other but it does not appear that Hobbs hits Wayne. If he does, Hobbs' hand grazes Wayne's hand after the ball is already knocked down. Wayne continues backwards out of the sideline near the back of the end zone. Hobbs keeps going straight through the back of the end zone.
Whether the ball was catchable or not may or may not be part of the rule, but IMO Wayne have had a tough time getting a hand or even a couple fingers on the ball while turning and his momentum carrying him away from the pass and out of the endzone. Where Hobbs was and was running, the ball could have hit him even if he did not try to get in the way.
Hobbs definitely gets in Wayne's way in his effort to catch the ball, but there really is no contact as far as I can tell. So the real issue is whether pass interference is enforcable on a play when there is no contact. Wayne does seem a little frazzled about the whole play and may have altered his path to the ball, but again he does not come into contact with Hobbs.
As for the Caldwell play, Caldwell definitely got mugged. Brady releases the ball on a lob to the back of the endzone. The defender grabs for Caldwell and grabs some jersey with one hand and almost full bore tackles him with the other. The defender actually grabs Caldwell's arm with the other hand and Caldwell gets turned around in the process.
As I remembered, Caldwell does start to fall as the ball gets there, but by that point it looks like the defender is involved in some hand tussling and Caldwell is not really in position to get to the back of the endzone where the ball winds up. So at the point Caldwell would need to make a play on the ball, it does look like the two are just mixed up in each other and the ball sails over Caldwell's head. But 5 yards early he was all but tackled (again, the defender pulled Caldwell's arm to drag him down) and no one saw it or called it. Instead of being 4th and 7 from the 20, it should have been 1st and goal from the 1. Seeing how the Pats settled for a FG (and their last points), that was a pivotal no call.