I'll go one step further and say Gutenberg needs to be surfaced as a beta feature to all WordPress users through an admin widget with an easy in-app method for providing feedback. This is standard practice in large software applications, usually marketed as "Try the next version of..." or similar.

Gutenberg is a breaking change both on the UX side and the code side and every WordPress user needs to be made aware of it and enabled to provide feedback about how it impacts their work.

In addition, we should actively engage UX, IxD, Content Strategy, accessibility, and other subject matter experts outside the WordPress island and request feedback. Projects like ours suffer from a lack of independent analysis, and Gutenberg is so significant a change that not seeking this input would be irresponsible. In my opinion.