The survey was targeted to the wrong crowd...it should have been pushed to the "end-users", not developers; perhaps a small set of questions or a separate survey just for developers.

The negative comments on the questions are a general indicator of the lingering dissatisfaction with the Customizer.

I've said this repeatedly, the customizer should only be used for themes. Quite awhile back, it was being pushed to stop and replace theme option pages that theme authors were using, so to keep consistency and to use the API, the customizer was to be used for themes. Somewhere along the lines, piece-by-piece, the admin area was slowly finding it's way into the customizer like a virus.

I've had many customers complain about how difficult it was to use it with menus, widgets, theme switcher/previews, etc. I've had many even ask why all that is mixed in with theme options.

Again, the customizer should have only been kept for the active theme for its options. WP has gone the wrong direction with this, and to say it's a work in progress means it will only get more messy and tick off a lot of end-users.

For the surveys, if WP did it properly, they would seek out the end-user market due to the fact they are the ones who use WP...and to get enough of them to take the survey. I mean there's millions out there. Perhaps even hiring a professional market research team to do this so that real honest facts are collected.

I mean only 50 replies and many are developers? Seriously, that is like going around the office to take a survey and not stepping out on to the street to seek out the users.