I am much more concerned about dodging the bullet of watching Matt Moore try to QB this team with Davone Bess & Brian Hartline as his top targets. Signing a guy like Flynn (or even Alex Smith) would allow the Dolphins to shoot for a top WR in the draft. Without signing Flynn or Alex Smith, an idiot like Ireland might reach for Tannehill, or even trade up for him. And that would be the biggest disaster of all.
I agree that reaching for Tannehill ( or even trading up fir him , shudder) would be incredibly stupid but you can't pay a player that you project as a backup "starting" money. They tried to get Flynn cheap but he went where he has a better chance to start, Moore is better than Jackson. It would've been a tough battle between them but we'll never get to find out. It was just too costly for the Dolphins in their estimation. I would've tried harder but it's not my team.