This is starting to remind me of Gibbs 2.0, when they compiled an overall losing record and really were not making progress. 6-10, 10-6, 5-11, 9-7. They made the playoffs twice, the second time when they played way over their heads after Sean Taylor's death, and had an overall losing record under Gibbs.
Shanahan's record is worse, with 1 playoff appearance. They hit a hot streak last year even more impressive than the hot streak after Taylor's death, and made the playoffs. I think that fooled us all into seeing them as being better than they are.
Defense under Shanahan has been bad overall with some periods of time that were just disastrous. There have been games each season where the team looked utterly unprepared. Special teams have been a pretty consistent stink.
At 1-4 it's pretty difficult to look at the body of Shanahan's work here and see it as equal to Gibbs 2.0. Both seem to get by more on previous reputation than on current performance.