ss88us Most customers with their 20 plugin wordpress site will not have a good experience enabling Varnish and then complain instead of realizing their site and not knowing how to configure and test Varnish is the issue.
Honestly if a site is beyond FastCGI caching and is getting enough traffic to actually need Varnish (instead of just a better server or fewer plugins)... they shouldn't be running the site on Enhance or any panel. It should be on a secured VPS or dedicated server managed by a qualified server admin.