The absence of the spacer is altogether more significant as it could have helped in deflecting some pieces of rubber from the wing and from the engine intakes.
Is there a confusion here? The Air France Concorde that crashed was missing a spacer on the landing gear that keeps the wheels aligned and properly separated. That was because it was inadvertently not replaced after maintenance some time earlier. As I understand it, all Air France Concordes also lack a protective shield that BA has installed on the undercarriage of its Concordes, to help deflect any debris from blown tyres away from the wing.
You talk about the 'missing spacer', but it sounds like you mean the 'missing shield'. There is no way the missing spacer could have deflected debris, had it been present. The worries about the missing spacer is that it might have slowed the aircraft's acceleration and induced a yaw because of the misaligned wheels.
Let's make sure we don't get ourselves any more confused than we already are.