WeCollective, a user-owned coop replacement for Reddit with polling tools and better categorization features is having a vote on a new feature:
"In poll discussion threads, show as the top comment a comment posted by a person that voted different from you, but that was most upvoted by people who voted like you."
This would reduce echo in the echochamber.
Vote here: https://www.weco.io/b/root/p/leosammallahti-1511453981147/vote
Everyone can register for free and everyone has 1 vote on decisions. Oh yeah, we just turned opensource!