They should invest in some PR to let people know it's a platform, not a monolithic community. Although some people identify as "Redditors" which kind of undermines that point...
On Reddit, however, there’s a huge amount of great content I’m unlikely to stumble upon unless I’m seeking. This makes behavior based recommendations difficult. I think a combination of curated views (software eng front, political junkie, counter culture, etc) and machine based recommendation like YouTube could do great things for reddit.