Good list of questions there.
A few more suggestions (from an employee of an FTO):
* Can I visit on a normal school day (open days are good, but normal school days show more)?
* Can I spend a coffee/lunch break with current students?
* What is a normal / maximum groundschool class size?
* How many ground instructors do you have (i.e. how specialized are they)?
* Can I see your groundschool notes? Do you use those notes as the main reference in class?
* Where do I fly from for the tests?
* How many students per flight instructor is your maximum?