It's generally accepted by all parties that the deviation from centreline was caused by the sheer amount of thrust asymmetry caused by the starboard engines functioning normally with reheat and the port engines being impeded/damaged by the fuel fire. The missing spacer may have had an effect, but even if correctly fitted it is *extremely* unlikely to have changed the outcome beyond losing control at a marginally higher altitude.
Such a gain in altitude might have altered the location of the crash, but the controls would still have been destroyed by the fire (the existence of which is irrelevant to the spacer) at the same rate - there's simply no way they could have made Le Bourget and landed safely with that kind of damage.