spoilers are not for ground steering. machin bird perhaps you can tell me what plane could be steered on the ground with spoilers?
IT has been reported in the NTSB report linked above that the SPOILERS DID NOT< REPEAT NOT DEPLOY AUTOMATICALLY and the F/O Quickly deployed them manually.
We know this can happen when the variety of sensors detecting and interpreting that the plane is on the ground get fooled somehow, so we are ready to deploy the spoilers manually.
AS some of the same things which tell the spoilers to come up are also the same things that might start the auto brakes working, maybe there is a connection? maybe not?
Coming out of reverse like bubbers 44 has mentioned is a well known technique and it is probably better to go off the end of the runway at 40 knots than the side of the runway at 100 knots.