I wrote in for window treatment help 6+ months ago for big living room windows with different heights .... https://www.houzz.com/discussions/need-help-with-window-treatment-ideas-for-big-windows-that-are-different-heights-dsvw-vd~148587

7 months later...We are supper happy with the results and no more echo with the tall ceilings...I was scared to take the panels all the way to the top...but so happy we did! Note the panels do not close; we use electric blinds to manage light/temps...and didn't block any of our views with fabric!