The GOP autopsy appears to have worked. I think the Tea Party stranglehold in the GOP caucus might be broken.
You do realize that Tom Cotton, Joni Ernst, and Ben Sasse are all tea-party candidates, right? I don't know if Steve Daines is or not, but I wouldn't be surprised. If anything, the tea-party crowd will likely be emboldened by these results. As for the so-called GOP autopsy, 2014 doesn't prove anything about its success or failure. They still have all the same problems they did right after the 2012 Presidential election, but the Presidential year electorates and midterm year electorates are extremely different (as we've seen from 2008-2014).
As for the OP's question, this is the correct answer:
What's wrong is that we have two different electorates that are increasingly different from each other and the way our system is set up means that we have wild, embarrassing swings from pathetic ~40% turnout rates. The end result is a wildly unstable and schizophrenic government that doesn't represent the broader population, exacerbated by other issues such as voting rights restrictions, gerrymandering, the nature of the Senate, etc.
