Personally, I think the coconut milk-coconut oil-egg coffee creamer is a Whole30 fail! It is classic sex with your pants on. You are using compliant ingredients to make a version of something to which you are addicted. The Whole30 is a time to grow in your relationship to food, not to hold on to your past as closely as possible. It makes me sad to see so much energy devoted to recreating the coffee experience of an unhealthy past rather than exploring the broad vistas of healthy eating.
The problem with heavy cream is the milk solids/proteins. They are removed from ghee. Ghee is allowed during a Whole30 because it is almost entirely fat.