From Bill's last Super Bowl winning team, players that appeared in >20% of snaps in the Super Bowl:
Draftees [21]: Mason (4), Cannon (5), Thuney (3), QB (6), Gronk (2), Edelman (7), White (4), Michel (1), D McCourty (1), Trey Flowers (4), Hightower (1), Wise (4), Harmon (3), Chung (2)*, Malcolm Brown (1), Roberts (6), Ebner**(6), Slater**(5), Crossen**(7), Cardona**(5), Gostkowski**(4)
Trade [7]: Trent Brown, Dorsett, Dwayne Allen, J McCourty, Van Noy, Gilmore, Shelton
UDFA [7]: Andrews, Develin, Jonathan Jones, JC Jackson, , Adam Butler, Brandon King**, Ryan Allen**
RFA [1]: Hogan
UFA/waiver [6 or 7]: Burkhead, Guy, Clayborn, John Simon, Chung*, Ramon Humber**, Albert McClellan**
*: Chung was drafted, left as UFA, and resigned as UFA.
**: Snaps were primarily in special teams, which matters here given the nature of that particular game.
So, tell me how Belichick has "lost it" as GM?