Academically, just for the sake of discussion, let's assume the A330 has a deep stall mode in ALT 2 with a CG near the aft limit. (This has not been determined to my knowledge.)
With unreliable inputs in what would probably be a fairly "locked" stall situation, would not ALT 2 logic position the elevator to cope with what it thought was occurring? In a deep stall with not much aerodynamic change taking place could not the elevator effectively be "frozen" in one position with fore or aft SS inputs possibly having little or no effect?
The A330 does not have a pitch override switch (ala the F-16) to allow the pilot to gain full movement of the elevator and use the SS to "rock" the aircraft.
Manual THS input in the nose down direction might result in additional nose up elevator to preserve the same dynamics. (BTW the THS manual trim wheel will remain where it is positioned by the pilot in ALT 2)
Could not flap extension provide a required pitching moment?
(As 'Hoot' Gibson said, "Gear down.")
If this has been discussed before, my apologies.
edit: by the pilot