I have a 910 D3 9.5* (adjusted to 10.25*) with a 45" stiff Ahina shaft, and I also have a Razr Fit 10.5* with a x-stiff 45" Kaili shaft. The Razr Fit has a considerably tighter dispersion than the D3 and so far I have not noticed much distance loss. (It feels and sounds like it's shorter than the D3, but I can't prove it yet)
The problem is that I don't know if the difference is more attributable to the clubhead, the shaft type, or the shaft stiffness. (If I knew it was the shaft, I'd get a matching one for the D3 and try it out)
To tie into the OP's question, if I just tried a shorter shaft in the D3 to go straighter, distance would probably come down (all else being equal) so I don't think that is necessarily the answer.
EDIT: And for the record, I am 6'-3".