A lot of people will probably tell you that what you’re asking for is an oxymoron. It’s not, it sounds very cool, it just occupies a point on the spectrum that’s likely to take a lot of work to keep in an arbitrary balance between rock solid and bleeding edge.
I haven’t used any of the arch install scripts but they seem to have regular problems. Doing it the usual way is a proper way to roll your own but it doesn’t give you options. You have to know what you want, or you have to know where to find out what exists.
The guided installer is going to be important to a type of person we’re going to see more and more of: power users that know what they want to do, but for whom the Linux ecosystem is a foreign and fractous entity what uses entirely unfamiliar nomenclature.