The bottom of the order is under-rated but important. Crawfords' OBP does not warrant him hitting in the top six spots, but he can be an important component to the bottom of the order. He has some power and speed. Let him empower the bottom third.
My biggest complaint with Francona was his penchant for letting the order take care of matters. He had two of the best base runners in baseball in Ellsbury and Crawford, yet he tended to play conservatively. With Crawford batting seventh, the Sox have a bottom of the order force capable of powering or stealing his way into scoring position. With Crawford in scoring position, the Sox need only one hit from their eighth or ninth hitter to produce a run. Too often bottoms of orders are limited to three hits or on base chances to produce a run.
The Sox have Crawford to energize the bottom third, and that is a plus.