Have you tried penalizing comments based on the rate of upvotes it's receiving? If that rate exceeds a certain threshold, the comment is pushed down the page be

Have you tried penalizing comments based on the rate of upvotes it's receiving? If that rate exceeds a certain threshold, the comment is pushed down the page because it is likely either a) too short to contribute any real value and/or b) being upvoted more for its emotional effect. And in the case when it's neither of those, this gives other less popular opinions a chance to rise to the top.