While that might refine results some more, I went into the exercise of compiling everything thinking:
If this shows the Steelers as the best "worst" team, the results probably have some validity.
I don't think converting votes to percentages will give us the magic formula. I think, at this point, knowing who the playoff teams were, who the "worst" teams were and the relative strength/weakness of those receiving few votes for either has given us enough to start some polls and/or get some discussion going about who in the "worst" group gets #1 overall, which teams barely missed the playoffs and should pick in the low 20s and a start on figuring out how everyone else places in between.
Of course, if someone wants to do more work using the suggestion DDoM made or by some other methodology, I'm glad to consider it as well.