The default design is rather unergonomic (you're less likely to downvote by tapping on the wrong closely located button if you want to upvote since you can have

The default design is rather unergonomic (you're less likely to downvote by tapping on the wrong closely located button if you want to upvote since you can have the more frequent upvote action in a convenient side swipe gesture, but the less frequent downvote in a separate hamburger menu - things like this you won't get from reading a feature list) and ugly (fonts, padding, colors) , but if it doesn't even occur to you, then maybe you won't appreciate all the improvements, so maybe not missing out?