I briefly looked at the Family Search references, as I sometimes use FamilyTree family groups. References are a mixed bag, sometimes they support the provided information, sometimes they support some of the info, and sometimes they are irrelevant!
Sources like cited church or civil records I think are certainly acceptable. FamilyTree is a secondary source, and is not static, as anyone can go in and change things. I have seen unsupported changes in some of these families, which makes me wonder.
My point, perhaps not well stated, was to add the sources you can find for the data.