It can be a bit of an echo chamber, not just in terms of politics, but you do fairly regularly see people with either a valid question or even an unexpected (and possibly not well liked) correct answer get downvoted into oblivion.

However at least it doesn't outright promote controversial content.

Did worry a bit when I recently got invited to do a reddit survey and there were a bunch of questions about discovering new content/subs. I sincerely hope we don't end up with r/all or trending new subs being forced into our regular home page.