I agree if Bledsoe falls flat on his face and this team flops he will be pulled. But I don't think he will. Also Parcells was basically doing what he always does by sending messages through the media to his players, which I can't stand and think is a lousy coaching tactic of his. Say what you will about his 2 Super bowl wins and great track record. It is unquestioned. But I think Parcells is a tool when it comes to taking that line of communication with his players.
Bledsoe's positives do outweigh his negatives as long as they win and he is effective. So far they are 0-1. If they go 0-3 and Bledsoe is the root of the cause then yes, Parcells might make the change.
I don't think one game get's a veteran like Bledsoe benched. It would take a lot more than that.
Your comments seem contradictory to me. On one hand you say you think it would take "a lot more" than one game for change, but then you also say you can see it happening after the next two games. I also don't see similarity between Bledsoe falling flat on his face and being the reason they go 0-3.
As for Parcells methods of communication, I don't see this as a factor in whether Romo has fantasy roster spot value or not, so I have no comment on that here. I mention it only because it's mixed into the quote.