I wish Reddit would pay some more attention to the meat of its content...the comments.
The default view/experience is awful, imho. Let's assume there are about 10 separate logical lines of thought, which have been expressed as "root" comments - that is, responses to the original post. These have been upvoted.
What do you see when you start browsing? You'll see the top voted root response...and then potentially pages upon pages of upvoted s*tpost responses, rhymes and pun threads that get beaten to death, in jokes, memes, etc. Only after you scroll through all of this will you get to separate discussion thread number 2.
Next up - down voting has long ceased to be a mechanism for true moderation and getting rid of off-topic or nasty comments. It is just the default "I disagree with you or don't like what you said for some reason" action, and once the downvote spiral starts, it's very easy to just get wiped out of the conversation.
The problem this leads to is the super prevalent group-think and echo chamber nature of most sub-reddits any more. As much as the reddit "hive mind" is a joking expression - it has also become all too real. Many popular reddits even have a corresponding ____circlejerk counter part - to me, evidence of how common this effect is (if you haven't read one of these, they are usually a humor outlet where people make sarcastic/parody posts of the common recurring themes in the actual sub-reddit.)