Automation
Is this not something that could relatively "easily" be caught by the onboard warning systems?
If it can display the graphic showing the ailerons down but the spoilers up, it can alert a master caution that something is wrong with the flight controls.
In-flight, this would still be extremely confusing, but at least it might lend a bit of clarity as to WHY it's behaving incorrectly and what steps to take. My thoughts with this warning were actually while still on the ground, but that would require a flight surface check anyway, which either was not done here, or was not interpreted correctly.