if BP wins a title this year with TO being a big part of it, then i think everyone will see him as a legend and he'll be able to retire peacefully. but getting to the big game isn't gonna be a walk in the park. shoot, winning the division won't be a walk in the park. BP hasn't done anything significant since he's gotten here in terms of winning (now you know how the skins felt with norv/marty/spurrier) and if he doesn't win this season with all the upgrades, people will think the game has passed him by (sounds familiar to what the media said about another coach lol).
but simply put, if BP can keep your team together and make it work and keep TO on a leash and get you to the big game and maybe even win it, then he should be known as one of the great coaches of the NFL.