The split controls systems reminds me of the VC10.
In that case the control surfaces (although hydraulically powered) are actually linked to the control column by cables with the Captain's yoke controlling the ailerons and the FO's the spoilers (or vice versa - it was a while back, you know!). Then the two yokes are mechanically linked so that each driver can operate both controls.
Then if one set of cables stick, you separate the two yokes and whoever has roll authority gets to land the aeroplane. It's happened at least once, if not twice, withing the RAF fleet.