The answer wouldn't be that exciting. They'll just blame injuries, and the mumps thing happening at the wrong time, and continue to claim the roster they assembled could have been competitive (i.e. the fault lies with circumstances outside their control). Maybe WD is thrown on the sacrificial alter and they sorta blame coaching, maybe not and he's just a victim of circumstance as well.
I'm very interested to see, however, the way they try to present next season. Curious whether they revert back to "re-tool" and try to sell playoffs again, or we get the full rebuild talk. If they revert back to the re-tool narrative and this happens again; I don't see how they're not all fired.
As to the post above, finishing this low in the standings was definitely not deliberate.