The only thing that would make people like the new design would be coming out with a newest design. It’s the perpetual law of redesigns, which makes me believe a very vocal fraction of the internet lives in constant horror of the world around them changing.
Most designs aren't good enough to become huge sites like Reddit. Most redesigns aren't better than most designs. So if you take a very successful site and redesign it, more often than not it'll become worse.
Unless you really, really understand why your original design was so successful in the first place and you make sure you keep those things, but Reddit's just seems like generic web design of nowadays.