I really don't know why big companies like Google are terrified to make options.
You made the quick settings show only 4 options immediately. Your research might show that 70% of people prefer it that why. Instead of leaving the 30% in the dust, why not just make it an option in settings? Or even have custom layouts?
Why not add more lock screen options? Why not add options for the navigation pill? Why not make "at a glance" an option?
Even iOS is catching up in terms of customization and at this point I'd say it's surpassed Android. I still prefer Android for many other reasons, but it has lost one of its main qualities.