Agreed. This is supposed to be a step forward? Somebody forgot that the admin area is a tool, not a playground. The interface has lost much definition to delineate the disparate functional areas. There was an incredible amount of ‘polish’ to the wordpress backed. This made using it a pleasure for even novice users. This update will certainly be a challenge for my clients. Additionally, forcing responsive design is a poor decision at best. Hopefully, somebody will figure out a way to ‘theme’ this back to normal very soon.