Since a descent should have begun around 100 miles west of MSP and then they flew at 37000 to the airport and continued 150 miles past the airport, it seems they were not paying too much attention for at least 250 miles. Not to mention that according to the NTSB they were not talking to ATC for well over an hour. Unfortunately, the FAA may not be content with a simple letter in their file on this one.
Obviously, everyone has forgot to check on with ATC, missed a frequency change, or have been given a bad frequency. (one of which is probably where this thing started to go bad) After that I wonder if its another case of an improper range/scale selected on their tubes that initially masked their proximity to MSP. Then at some point they got into their heated debate and just checked out. Like other incidents in aviation, an error chain that keeps compounding
I feel for these guys and realize that they will probably pay a heavy price no matter what the FAA/company punishment is and for that reason I hope we can all learn something from this.