This is revisionist history for 99% of Bills fans. I don't remember your opinion on it specifically, but the prevailing opinion on this board was that Chan didn't give Spiller the ball enough, and that he needed it more. Chan was the one who "misused" Spiller by not feeding him. Then, Spiller sucked, and we found out that Chan was right on the mark.
Pre-2013, it was all "Spiller should be getting 20 to 25 touches and Fred 5 - 10." Not Swiss Army Knife.