Opening CMake project with custom parameters is confusing and error-prone

The CMake project configuration dialog is confusing and error-prone:

• It is unclear what to fill in in the Initial CMake parameters field and what below and why.
• The Initial CMake parameters field is text-only while the one below is a table. This is inconsistent.
• It is unclear that one is supposed to click "Build --> Run CMake" from the menu after filling out options in the initial CMake parameters field. I tried to click "Apply configuration changes" which is the only button there. But if the resolve fails, I am loosing all custom options in the table which is frustrating.
• Even though I am using a kit without Qt, the Initial CMake parameters field contains Qt-related CMake parameters by default.

All in all, the user experience is quite frustrating for somebody who has not carefully read https://www.qt.io/blog/cmake-project-configuration-in-qt-creator-4.13. The dialog should provide more guidance.