The overall ratings don't tell you a ton in 2k -- this is coming from somebody who's spent way too much of his life playing 2k.
Crawford seems totally overrated, but all score-first guys are overrated. Beasley is usually rated in the mid 70s. Notice that Brooks, too, is way overrated. Neither is particularly useful in-game.
Bradley is definitely overrated, though.
Rondo might be the least useful -- from a purely in-game perspective -- player rated in the 90s in the game.
Kelly Olynyk's rating seems super low, but that's always how it is for shooting big men, especially rookies. Dirk's rating has always been in the low 80s even when he's been an MVP caliber player in real life.