This is an unfortunate development in the process, but two positives exist, 1; the new issue has been discovered before RTS, and 2; it has been acknowledged.
TBC can spend a lot of time sorting out the hardware on this, and probably about the same in getting a software solution, or they could add an interrupt off the ANU side of the trim switches to de-power MCAS in all cases. An isolating system using existing switches would be a quick but dirty solution to the problem. The lights will be burning in Seattle, and hopefully the lighting bill is paid for by stopping paying to lawyers and putting the funds into the company where it is needed, solving the problems of expediency.