New Acrobat has at least 5 menu / tool locations that can not be hidden and panels that pop out.

To call this messy, annoying and cluttering is an under statement.

At least the top menu bar has been slimmed down compared to the prior version.

The top window edge has enough space for all items.

The bottom edge status bar can stay.

ALL OTHER BARS SHOULD BE COMPELTELY UNDER THE CONTROL OF THE USER FOR CONTENT AND VISIBILITY - AT THE APPLICATION LEVEL, NOT PER DOCUMENT.

Ideally, for my uses, Acrobat should open one windows PER document (another bug/omission, reported elsewhere) in what you now call READING MODE, ALONG WITH the document title, page number boxes , zoom, and layout buttons in the top window bar. Thats it. AND I REPEAT - ALL OF THESE ITEMS UNDER USER CONTROL.