That isn't what I would list as one of its biggest problems. The biggest problem is that the strongest determiner of what makes it to the front-page is the rate

That isn't what I would list as one of its biggest problems. The biggest problem is that the strongest determiner of what makes it to the front-page is the rate of upvotes rather than the upvote to downvote ratio. This favors thin content because thin content can be upvoted more quickly. Content that can be upvoted based on the title alone does best of all.