The First X38 is increasing from Monday, i had a look on the app around 10am and there was one Edinburgh bound full before it got to Linlithgow. As i'm sure you're aware part of the issue with the X38 is that deckers are not suitable. I can't see the LCB X38 being reinstated at the moment as it's in no way an essential service and the Gov are more likely to put funding towards the First route.
It would certainly go some way towards not leaving (potentially vulnerable) people stranded, even if it's not your personal choice of operator.
I'm sure if it was LCB running their X38 and First's being temporarily withdrawn it would suddenly become an essential service in your eyes and whatever hypothetical LCB service level would be outrageous.