I would love to see this but I'm also in that lower % of users that ends up using some kind of automatic building.
But really having the GUI just wrapping a CLI is actually fairly common. It all depends on how far along @Ashley is in his design.
It would be amazing workflow to just be able to push to a repo and have another service actually do the building. My larger projects are starting to take a long time to export. Automatic building saves quite a few cycles in a dev's day. Once that build is made, automatically kick off a itch.io Butler CLI and then your game is already deployed to a game portal.
This would also help beginners start to become intermediates