I also noticed you added the PHP and Nginx User setups for security would you also add a FTP / MySQL option even though it is easy for us to just edit the vb scripts to suit our needs for other services but i was just thinking for others.(Maybe they are lazy)

I am not sure if anyone else uses the following program https://bitsum.com/processlasso/ but for me in a server enviorment it works wounders i can set the CPU affinities and seperate Nginx from PHP to its own CPU Cores. But i am curious if it is a bad thing to do this when i have "worker_processes auto;" set to be auto and create the number of Nginx instances for the number of CPU cores avaliable.
http://nginx.org/en/docs/ngx_core_module.html#worker_processes