I don't understand why HKATC doesn't just start taxiing aircraft to the hold on 07L via taxiway A. Why do they insist on turning them on B.
I understand that the pilots were wrong, but sometimes you design the system to remove even the occasional brain-fart.
New airport design has taxiways like W and V that force you to make a 90 degree turn before reaching the runway. It was recognized long ago that it was just smart design.
How about making the head of the runway accessible by only one path. There is not that much traffic in HKG that they need A and B at the same time. 07L is only used late at night for departures when 07R is closed for maintenance.