I agree with OP and have already started a thread about it.
The font size is nasty large and needs to be adjustable. Likewise, with the sidebar.
Another thing I noticed was, if you click the menu bar items with a mouse it moves the app window. They allowed a clickable area to also move the window rather than opting to use the top of the sidebar or window itself, avoiding this scenario.
IMHO, it's bad! It disappoints me every time I use it. And if it is a clue as to how macOS is headed come the iOS app compatibility thing, I guess I'm out. Home, News, Stocks and Voice Memo's are equally as bad. iOS wrapped. And not wrapped well.