No, there certainly should not be a concensus of all 7 of the crew on this play. The R should definitely have no idea what is happening downfield. But, the ball was thrown to the middle third of the field, so it is totally conceivable and quite possible that there could be six sets of eyes on the play. Since the ball was on a relatively low trajectory, the U quite properly had turned to be of help with the catch. The receiver was #1 to the H side, so he was the S’s key, so the S is definitely on this. The other receivers were not immediately threatened. So, when the ball was thrown, all the eyes of the deep guys and wings should go to the intended receiver, unless there is something compelling to keep their attention elsewhere (such as some sort of personal foul action). So, that is as many as 6 sets of eyes that may have input on the play. But, in reality, there are usually about 3 guys that actually get a beneficial look at the play. If I was the R, I would want to get as much input as possible, especially if it might involve a DQ.
On that particular play, in the views provided, we see the U pull his flag, then stuff it back in his belt. I believe this is because he saw the S toss his flag for the foul, and decided he didn’t need to complete throwing his. We don’t see the S’s flag, but you can see another official - presumed to be the S, with game card in hand - communicating with the U and R, which, although circumstantial, is pretty conclusive evidence the S threw on this. So, I don’t believe it was only the U on this call.
Robert