The only thing San Fran needs to do in order to stay at their current level is to tell Shanahan to not let off the gas late in games.
The rest of the NFC is playing catch up to them.
No, their front office is going to have to be creative with some contracts this off season.
There's a good chance they'll lose Armstead, which will impact their line, and both Sanders and Bourne are free agents. They've got few draft picks and the cap is tight.
Barring any injuries, they'll still be a top team in the NFC, though.