Change is scary, BB has been my comfort zone for a long time. Change was necessary, I get that too.
Yeah, I think it's the right time for this, but there's no doubt there's going to be some transitional pain. Belichick did so many things, we're now starting from scratch. That CAN be good, and in many ways I think it will. But for example, a poster above listed some of the amazing defensive games that Belichick has engineered here. You'd hope they're able to maintain some continuity on that side of the ball, but whoever it is isn't going to be as good as Belichick.
Also, how many times did we see undrafted corners turn into starters (Jon Jones, JC Jackson, Butler, hell even Bryant in a way), or edge players who were borderline special teamers on their old team turn into key contributors on Super Bowl defenses (Vrabel, Ninkovich, Van Noy, and though not on SB team, Tavai's development has been tremendous). There's no better teacher of the game than Bill, and I bet we see fewer of those longshot stories, at least at those positions. On the positive side, maybe we see more of those developments among wide receivers.
But it'll all be different. It'll all be weird. Just going to have to see where it goes. But anyone who thinks this is just a cure all for everything that's gone wrong the last few years is in for a rude awakening I think.