Is Crawford a factor when he is not knocking down 3s? He is argueably more of a streak shooter then Bibby and less of a distributer. The Hawks were so much better with Bibby versus Tyronne Lue, another streak shooting combo guard, because of Bibby's improved playmaking skills (not that they are on the level of the true elite point guards like Kidd, Paul, Williams and Nash).
Also, Crawford is basically the same age as Bibby when the Hawks acquired Bibby (i.e., a little less then two years younger), and is an equally unwilling defender.
And while Teague has talent it just seems slightly unrealistic to expect a low draft pick, that obviously needs further refinement and development to his game, to make a large immediate impact. There are plenty of examples of college combo-guards making good on their promise (such as Devin Harris, Jason Terry, Allen Iverson, Bobby Jackson, Nate Robinson, etc.), but there are even more examples where they do not become major contributors (i.e., Marcus Banks, Troy Bell, Dejuan Wagner, Quincy Douby, Acie Law, etc.).
I don't see any reason why Teague can't at least become an Aaron Brooks type of contributer by year two, but year one might be a stretch.