The only good thing I can think of, is the password encryption and security enhancements in general.
Why did not just do the security enhancements ?? WHY ????
Funny thing about that is the keys used for the encryption are stored somewhere in Plesk, because there's a CLI command that will output the admin password in plain text if you need it.
/usr/local/psa/bin/admin --show-password
I agree with everything you said about the hosting aspects; I like how they tell the hosts what the hosts want.