Not that I'm aware of but @Kier
or @Chris D
If you can't access the ACP you would need to submit a ticket so we can edit the config.php file to disable listeners.
Unless you have an exact replication of the site and traffic, you wouldn't be able to do a comparison anyway.
It would require those who have moved from dedicated to cloud to show stats of before and after.
Yes - that's what part of the fully managed aspect of the service entails.
It means that tickets and issues would be prioritised over others and managed until the issue was resolved (although turnaround for tickets is very fast anyway so you likely wouldn't notice much, if any, difference).