The biggest tweaks I would make at this point...
1) Start reducing Dalvin's touches... he's currently on pace for 370 this season (312 rushing attempts and 58 receptions). That's a lot of hits and the Vikings need to think about the additional hits he'll take if they make the playoffs. Mattison has looked really good in just about every game this season. I hate taking Dalvin off the field, but we need to save him a bit. I don't know why we had him in at all late in the 4th quarter on that 8 minute drive to end the game.
2) Blitz Anthony Barr more... when he is rushing the passer, he makes plays. I think we are continually under-utilizing his best trait. That sack last night was perfect, he got there in a hurry.
3) Play more man coverage... Rhodes clearly isn't as comfortable playing in a zone when he can't get his hands on guys right away. He tends to get grabby further down the field and he isn't playing well. Some of that is on Rhodes, but Zimmer needs to take the next 10 days and use it like a bye week... make some tweaks to the defense for the 2nd half of the season. We have 3 more games to evaluate any tweaks before our actual bye week. Get an early start on it because the defense the past two weeks has struggled defending the pass and getting off the field on 3rd down.