Honestly, I don't think they tanked this season. That franchise has been plagued with personnel and staff issues from the beginning. This past season was the end result of years of poor management IMO.
As a season ticket holder from the beginning, I can tell you that they tanked. It infected the entire team. Most nights they played with no heart and no will.
Yes, they've had issues and yes, they had poor management but one does not preclude the other from being true. Paul Silas was a babysitter last season. His job was to do nothing more than make sure they had the worst record in the league. He was pretty effective.