The don’t need to expand it. The PER- JNB- PER flights wouldn’t require an expansion of the T3/4 international facilitities and would operate at different times to the current 9/10 Services. PER Airport has said ‘nyet’ to doing that and insisted the JNB Aservice be operated out of T1.
That simply isnt feasible. I’ve been delayed for an hour ex T1 waiting for an aeroplane to be towed across from T4. It stuffs the efficiencies for the fleet. It’d be similar waiting for the 330to be towed across from T1 to T4 to operate further east.