If it's paid, premium, it's got to be better, right?
--wpredis in EE is a full page caching, the same with other WP caching plugins, including WP Rocket. Meanwhile the redis plugin is for object caching. That means you have a complete caching solution.
It baffles me why would people want to add another caching layer on top of that.
Page/dns preload, prefecth - does it still matter with http2?
I hope EE team can focus on what's more important for v4 release, instead of trying to make EE compatible with redundant plugins.