My problem with it was that it looked truly disgusting and I don’t say that lightly. They had essentially cloned the Reddit “new” theme that has the all too common obnoxious overuse of white space over content.
I don't care about the visuals of Reddit, but copying the design of "this is a site for commenting, answers are just top-level comments with no distinction" seemed like they did not see the difference between Stack Overflow and a subreddit.