The Vikings looked like one of the best teams in the NFC, if not the best, over the first five games of the season before it all came crashing down. Then again, with Sam Bradford at QB and AP out for the year, they were playing above expectations in the first place. With Zimmer back, they're back to being as good as they are.
Zimmer has a lot of coaching experience. That experience comes specifically in the NFL. He has been a part of the Bengals as well as a part of the Cowboys. He has seen how a lot of people do things and he has been a part of winning traditions. He will bring this skill to the Vikings.
Zimmer is probably better off taking the remainder of this campaign off to recover.... He's certainly had an impact on this team defensively since being hired. Unfortunately, the same can not be said for his consistent lackluster O, which he also has to take responsibility for.. I know people like to talk about injuries, but, if you'll recall AP/the running gm being almost completely stacked up early in the season (and remember there weren't any significant O-line injuries at that time). So, really, I'm just not so sure that is a valid excuse.. It's certainly not as simple as 1+1=2.
The Vikings have struggled since their win against the Texans earlier this season. While a variety of factors are involved in this slump, losing a coach's guidance probably only compounded matters. The team has a long way to go if they wish to demonstrate they are serious contenders for the playoffs, the emotional boost no doubt contributed to the team's win against the Jaguars.