If its your position that the problem is Dak, and I am pretty sure that is what you are saying here, then the correct move would be to go with a new offense under Big Mike, correct?
Why you might ask?
Because if Dak is a bad QB and cant win games in the playoffs against the best teams, as you just said, then what would be the point of keeping Moore's offense? We saw the last two seasons that under Moore's offense, Dak cannot beat the best teams in the playoffs so why would you run it back and try for a third time? Isnt that doing the same thing and expecting a different result?
Logic would dictate that there are only two options, either get rid of the bad QB or change the offense the bad QB is in. Since it is currently impossible to get rid of the bad QB, the only logical step left is to change the offense the QB is in, correct?