So I'm not really in either side of the camp, but a couple things I'd point out...
a) A lot of those players you're going to lose, regardless of whether Mads is kept or not. Guys like Van Noy, Darby, Simpson, Maulet types of fringe starter, depth players. They're only staying if they're staying at near the vet minimum regardless. You'll just sign (or draft) other guys to take those spots. We find these exact guys every year.
b) if we win the SB, chances are you're not truly going to be a "SB contender" next year or maybe even the year after. It's just not realistic. We can claim we are a contender as long as we have Lamar, but part of the reason you can spend $15M on OBJ and still get the Clowney's, Van Noy's, etc. of the world is because your QB is still cheap. He's not going to be cheap forever.
c) We're 100% going to be in the cheap vet, heavy expectations on draft picks mode, starting next year. True regardless of whether you keep Mads or not.
The Darby's and RYS will be replaced with the Pepe's and the JADs. Rookie contract guys who will need to step up. The Clowney's and Van Noy's will be replaced with the Ojabo's and Robinson's. That's just the reality of things.
We're approaching the contract point with Lamar where we will live or die based on how well our draft picks play.
d) because of the restructure done on OBJ's deal, who I doubt will be back, you create a good bit of cap space post June-1, which you would use to sign draft picks., create extensions, etc.