But just think if they actually make the playoffs eventually...? (Everyone's already expecting you to be the worst team in baseball for the next year or two, and you're not adding significantly via Free Agency...)
All the credit will likely go to that manager and GM, so you essentially have nothing to lose (except for time, opportunity cost) and the Marlins job is far from a sure thing with the Braves and Phillies in that division, and even Washington on the rise now.
Assuming Venable couldn't get any assurances in Texas that he was going to eventually take over for Bruce Bochy, and when that handover was actually going to take place...a World Series team (well, one year removed) is just as likely to go after a more experienced Skip Schumaker, Buck Showalter, Fredi Gonzalez, etc.