4. Vrabel brings winning experience
First of all, with Vrabel, you know you are getting a coach with head coaching experience. Sometimes, that's a good thing. Sometimes, it's better to take a chance on an up-and-coming coordinator. But, with Vrabel, you get a guy who has had a good chunk of coaching experience.
Not only that, but Vrabel has winning experience. From 2019 to 2021, Vrabel led the Titans to three-straight playoff apperances, with an AFC Championship berth in 2019 where they ultimately lost to the Patrick Mahomes-led Kansas City Chiefs.
While Belichick brings winning experience as well, he has also not had much winning in recent years. He has not proven he can do it without Brady. Vrabel, meanwhile, has operated winning Titans teams who bring physicality on both offense and defense. That's something Patriots fans can relate to and would welcome back next season.
Whatever New England decides to do in the coming years, it certainly seems as though Belichick's time is fading. The contract extension doesn't matter if the Patriots continue losing, and if there continue to be loud whispers about Vrabel being the organization's hand-picked replacement, it might be time to start believing that it could happen.