There are a few missing steps that turn into warnings in the UI
- enabling $PATH for FPM (set in php-fpm.conf where PATH is normally disabled)
- enabling opcache (set in a php.ini or opcache.ini)
- enabling APCu or another cache
(set in a apcu.ini AND config.php)
Is there a reason why php5-fpm is recommended instead of php7-fpm? Php5 isn't supported by many applications anymore and will soon become deprecated.