Maybe. We'll see. How many touches are you thinking for Spiller? 250 isn't that much really. He had 230 last year on a bum ankle. That's only 1 touch per game more. What I'm thinking is that his speed will be back and with that will come more touchdowns. I doubt a healthy Spiller is used less this season than last year. Expecting a bump of 1 touch per game isn't anything really considering how hurt he was last year.
Comparing Spiller's 2012

season to his 2013

season, we see that he had 6 more carries in 2012, but 300 more yards than he did in 2013. He had 9 more catches but 250 more yards. That's not usage based, the usage was arguably equal, that a dip in efficiency. I think that speaks more to his injury than to anything Fred Jackson did. Fred can just keep on keeping on like he has been (but he's older and father time is knocking) and Spiller could jump from RB27 to RB10 just by bouncing back and breaking off those long runs again. In 2012 Spiller had 12 carries of over 20 yards (6.0 avg), in 2013 he dropped to 9. That's not a huge drop but it's 60 yards. If those long ones end in scores, you are looking at potentially 60 more yards and 3 more touchdowns. Or put another way, he finishes 8 spots higher and in the Top 20. And that's without adding anything to his receiving numbers, which should also improve.
Look at it this way, this thread was started on October 3, 2013. I think the injury occurred in Week 2 or 3 (can somebody confirm this) but the team kind of denied it and kept saying he was in the game plan.
So if that's when it occurred, it means that he played the vast majority of his 2013 on a bum ankle. I don't think it ever healed. When Spiller was given rest he was able to roll out 18 fantasy points against the Chiefs and 24 against the Falcons in weeks 9 and 14 respectively.
Which is just a long way of saying, gamble on Spiller this season. He's healthy, super fast, contract motivated, and he's playing alongside an old man. Pay no attention to the injury marred 2012 campaign.