The old design was fine, the only improvement was the change from star rating to like/dislike, most other changes are pointless or worse, i also hate the location issue, it limits viewing a bit on what's popular but then i rarely watch the main videos section as it's mostly rubbish anyway.
One useful feature i want back is the ability to make quick lists that are uhh... quick? they removed the plus button from thumbnails ages ago, it did come back in a limited way to some areas but not under subscriptions where it's most useful.