I think this is very well handled on the part of Mozilla, especially with respect to existing customers. What's missing, which admittedly is not Mozilla's job,

I think this is very well handled on the part of Mozilla, especially with respect to existing customers. What's missing, which admittedly is not Mozilla's job, is to inform any existing customers that will have to renew during the time WoSign and StartCom are suspended. If they just get an invoice and pay it or are set-up with auto-renew, they'll unknowingly get certificates that aren't valid for the remainder of the suspension (or indefinitely, if WoSign/StartCom if violates Mozilla's requirements).