I like to remember how ugly and difficult it was to adjust to Reddit after moving from Digg's slick 2.0 interface. I think Lemmy will face more growing pains but will be the best solution in the end.
Reddit has literally never had a good UI/UX. It was worth it because it was the best alternative at the time.
That said, my requirements for a reddit alternative would have to be decentralized and open source. I just couldn't get into another situation like this one and I won't support it.