Tanking is a delicate balance. If you tell your fans you're doing that then selling tickets is nearly impossible, and that hurts the bottom line of the NFL, so other owners really frown upon that. Coaches know they're the guys going to be on the firing line for losing, regardless of what the GM and Owner say. Getting someone (Hue Jackson) to accept all those losses is tough to do. And inevitably, once the team turns the corner and starts looking promising, they fire the guy who accumulated all those losses and give all that fresh ammo to a new hotshot coach.
The best tank I've ever seen is the Indianapolis Colts' "Suck for Luck" campaign. They kept playing that incredibly inept QB and just stunk up the joint. Peyton Manning had willed that roster into winning records, and without him the team fell hard, but it was his stand-in who was unbelievably bad that clinched them the Andrew Luck sweepstakes. The fans were so bummed about Manning--the legend--and sad that he was at the end of his career and suffering that neck injury, that they were ready to hold a vigil for him and use those losses as a testament to just how great Peyton Manning was. They wore that 1-year down cycle as a badge of honor as they eyed the next great QB prospect and Peyton Manning prodigy Andrew Luck. Sure, Luck had injuries and hasn't been as reliable as they had hoped … but that tanking campaign was nearly painless! And it was so incredibly effective!
IMHO, that's gotta be the blueprint for the Dolphins. And if it doesn't go right in 2019 and we win too many games to get our franchise QB in 2020, then just stay the course (and starve the coach's resources) to get even worse for 2021 and the Trevor Lawrence sweepstakes. So in a way, the Lose-Lose mentality is a Win-Win situation. I know, it's lipstick on a pig, but hey, it's a pig, whatchagonnado?