The problem is that if you allow too much subjectivity, you add unwarranted volatility and too much of a "what have you done for me lately" type mentality. This among other things diminishes the value of a good resume.
Let me give you an example. Sagarin is a fairly objective measure, considering it's basically number crunching. He has Alabama #1, but #1 in everything, his predictor, golden mean, recent... He's not getting all excited or worked up about last week, it's just numbers and they tell us more than hysterical reactions tend to. He judges the resumes.
To analyze that a bit further, he has Oklahoma's SoS as 96. They played one great team and then two absolute nothings. Clemson has a higher SoS than Alabama, at 12 vs 39, but I don't, and I guess Sagarin's formulas don't buy that beating two lesser teams is better than beating one great team.
I kind of get Clemson, I do, but the real joke is ranking Oklahoma higher than Alabama. People do realize Alabama beat FSU by more points, right? They do understand Oklahoma hasn't played anyone else worth a darn, right? But yeah, what ever, Alabama beat FSU by 17 while Oklahoma beat Ohio St by 15, Alabama started out ranked higher, did better last year, kept their coach, and has played a tougher schedule. But yeah, Oklahoma deserved to be ranked higher because they looked better against inferior competition...