I think the trick here is to consider context. People should always see what's relevant and interesting to them - which means that if someone wants to see a logical well-rounded back and forth debate from two sides - that experience should exist. If someone wants to see a one-liner funny circle-jerk then that experience should also exist.
We can use reddit as a comparable since you brought it up
However, we know that that's not really the case on Reddit nor on GD as it is right now. People are upvoting posts they agree with and downvoting posts they don't agree with, regardless of the actual quality of the post. And the worst voters out there just read the upvote/downvote count and follow the herd.
This is true on some parts of reddit, and not true on others. take for example this discussion on /r/AskHistorians about trying to uncover some history about a sword.
http://www.reddit.com/r/AskHistorians/comments/13ri0u/this_is_short_sword_found_by_my_family_member_at/
Compared to this post on /r/AdviceAnimals about a guy saying something awkward to a hairdresser
http://www.reddit.com/r/AdviceAnimals/comments/1r4uum/oh_dear/
Both of the subsequent conversations are relevant to the context in which the discussion was started and neither would be the same in the other context - because each of the communities has their own guidelines and unique cultures. One of the really cool things we can do with this platform is create lots and lots of appropriate contexts where different things will appeal to different people.
For example - we could create a sub-community where you have to be Platinum or higher to post specifically dedicated to strategy discussion with heavy on-topic enforcement.
Being an opinionated person, I don't always agree with the majority of the population on General Discussion (although I do sometimes). What will your system do to protect my right to speak my mind and have my voice heard? How will your system differ from reddit (where anyone who disagrees with popular opinion quickly has their post sink to the bottom with downvotes and vanish) in order to accomplish this? And moreover, until you can guarantee that people like me will be able to make our voices heard, why even come to the new forum?
You have the freedom to speak, but you don't have the right to be heard by people who don't want to hear you. There should be a place where you can say what you want to say, and people who it's relevant to are going to engage with what you say.
Would we make a chat bar where anyone who wants to say something could blast a message to all players who are currently playing LoL? Of course not - that's ridiculous. Any forum or conversation platform is a discussion and content tool, not a broadcast platform. People treating it like a broadcast platform is one of the biggest reasons we're making many of these changes.