For example, in your comment here, to make it less downvotable you could say:
* What do you like about the redesign? There must be something positive you can say, even if it's just "it definitely looks more visually appealing" or "I understand that you were trying to improve usability by putting more information on the same side".
* Do you have any evidence that supports your counter-argument? If not, you're just two people with opinions, and since you're not a well-known authority on usability it's just noise.
* What would you suggest doing to fix the problems you've said here while also fixing the problems that the OP identified? Or do you not agree that those problems are really problems?