Hello, I don't know if already discussed but I don't think so.
you set it to 9999
probably you confused this option with pm.max_requests
they are different.
If you set pm.max_children to 9999, on high load the server is unusable for sure or crash. A small botnet or some concurrents users crash the server.
So, I think you misunderstood with pm.max_requests
2) FPM control panel
it would be useful to control fpm from a control panel where you can set some variables like pm.variable, php_admin_value[var] indeed...
per domain with a dropdown and save options or something like that...
3) Server template for FPM
How do you set it at the moment? Seems not existing....