The only long-term benefit to mid-season coach firing is if you know who you want to replace them with AND can hire them mid-season to get a head start on installing their new system. It’s rare you can hire a quality replacement mid-season, usually it’s interim/temporary.
Firing coaches and replacing with interim coaches could either boost wins that season or lead to more losses. But that’s for one season. If it’s bad enough that you want to fire a coach, don’t you want to max draft capital by losing remaining games vs possibly winning meaningless games with players a new coach may get rid of later anyway?
Keep in mind every new coach will say they need at least 1-2 years to install their system and bring in players who work in their system. So replacing a coach is accepting it may be 2 years before things start “working”.
Da Meatballs