Hello, what realm is this happening on?
As far as I know everything is working as intended. EoPR has no CD, Whipper Root Tuber can be used with potions, Mageblood Potion doesn't have a 2-minute CD. If you have evidence proving that oils weren't added prior to patch 1.9 then please provide us with the necessary documentation. Additionally, in the future if you could please provide factual evidence with sources as well as proof on your end (which realm; screenshots; video, etc.) that these items aren't working correctly. It'd be most helpful.
Best practice would be to use the Bugtracker (when it isn't down) going forward.