I don't agree at all that they need to drastically change their approach.
This is a team that has been wracked by injuries this year -- not just at QB -- and was 2-0 until Romo went down and gave way to what is one of the worst backup QBs out there. On top of that, we don't have the workhorse RB to fall back on like we did in tough spots last year.
If Linehan thinks that playing it close to the vest is the best approach I'm not sure I can fault him when I just saw last week that opening it up is also disastrous.
The most ridiculous thing here is that we all know if your starting QB goes down, you're fucked. Now that it's happened we are pretending like it can just be gameplanned around, no big deal.
We've been close to stealing a couple of these games, when every reasonable expectation should be you are going to lose significantly more often than you win without your starting QB. I'd say tweaks need to be made, not overhauls.
What I heard after the game from fans was frustration not rationality.