First of all, it might help to pose this in the Nightblooming thread. Second, there's a lot more to Panacea than coconut oil and shea butter. It has herbal ingredients, as well as other vitamins/moisturizers/conditioners. Also, it smells yummy.
But yeah, to me, the cost and hassle of purchasing and mixing all the ingredients makes it worth it to buy it pre-made (although I'm still working on a sample). I find that Panacea soaks in and leaves my hair silky, rather than heavy like plain oils/butters.