I don’t like new font, don’t like new buttons for wifi and BT in control center, new battery statistics is so terrible I stopped opening it as I am getting no useful information there.
Battery life - on some days seems better, on other days seems worse.
Search youtube and find creators that are known from making battery tests. Leave a comment under their videos describing your idea. Contact them also on Twitter. That way people will have a chance to like your comments or twits showing others interest in this topic.
In my case icons are the same size, font seems a bit bigger but you can make it smaller in phone settings.