I agree with your suggestion.
From: David Young <dsy@xxxxxxxxxxxxxxx <mailto:dsy@xxxxxxxxxxxxxxx>>
Date: Mon, 29 Feb 2016 22:30:06 -0800
Subject: [LRflex] Re: Sunset with CX plane
Suggest you try a 16x9 crop ... it cuts some of the excess foreground & sky and
makes, I think, the shot more dramatic.