I worry that having an explicit "agree/disagree" axis would encourage a popularity contest mentality, so I was about to say that this was a terrible idea... but

I worry that having an explicit "agree/disagree" axis would encourage a popularity contest mentality, so I was about to say that this was a terrible idea... but then it occurred to me that by having it there, it might siphon off the people that are using the upmod/downmod function as if it were agreement-based. So maybe it would be good after all.