DW - the Cali accident involved speedbrake and not ground spoilers, and I am not aware of any system change to prevent that.
(Re Post #2541): Assuming they 'went around' from the runway, what would have been their chances of correctly diagnosing the problem? After all, they would need to plan a landing at a diversion with no g/spoilers. That could be a problem.
Would closing down No2 clear the fault?