It looks like Mozilla and Google have created a set of circumstances where the rational next step would be to wind down WoSign/Startcom and just start a new company.
Which would require creating new roots to be submitted to Mozilla's CA program, and passing the bar for inclusion of a new CA.
That's a multi-year process, unless they can get another CA to cross-sign their root, like LE did. I doubt other CAs will be willing to carry that level of risk given the reputation of WoSign/StartCom.
