Serious answer:
A culture change has to be initiated. It doesn't have to be on the very first day but sometime early on, the new coach has to find their "
Wayne Gandy's recliner" moment. The implicit message being "
What we've been doing hasn't worked. At all. Adapt or move on."
One thing that might undermine this plan a bit is if any of the "
gotta extend!" veterans are really locker-room problems. Not
bad guys, say -- but maybe too-comfortable guys, or guys riding out the string, or guys no longer bothered by losing. If you can't waive 'em, you can demote them to second string. Without checking, I kind of think the gotta-extend crew are good dudes that will at least stay out of the way of true leadership ... but I'm not 100% on that.