I do agree with Dee Dub on this - the Steelers are definitely not one or two players away from being good. Heck, they are 2 players away at least on the o-line alone.

It won't happen but there are 10 college QB's who will get first round considerations from NFL teams:

Teddy Bridgewater- Louisville
Marcus Mariota - Oregon
Johnny Manziel, - A&M
Brett Hundley - UCLA
Tajh Boyd -Clemson
AJ McCarron - Bama
Zach Mettenberger LSU
Aaron Murray - UGA
Derek Carr – Fresno St
David Fales – San Jose St

You'd have to be in a position to get the young QB you think could develop rather quickly AND get a TON of players/draft choices for Ben for this to be anything more than a fleeting internet thought.