The ArXiv of the Future Will Not Look Like the ArXiv
authorea.com
authorea.com
With an orthogonal peer review mechanism (you can still upload your preprints, but third party review/peer review/editorial sites would link to solid work in their respective areas) there would be no need for the old publishers.
What we need is for the granting organizations to 1> require publication with normalized and raw data 2> require ArXiv publication and 3> fund some independent peer review organizations.