I don't know Wikiversity very well. My impression is that it is a mixture of cranks and actual academics. Neither of them would want a Wikimedia-appointed expert come and revise their stuff.
Also, the Foundation will not pay experts to vet content on principle. One consideration is that they do not want liability. Another is that they do not want conflict with the community over content.
Also, the Foundation will not pay experts to vet content on principle. One consideration is that they do not want liability. Another is that they do not want conflict with the community over content.