I would welcome an input from an AB driver on the system but I would assume the same safety interlocks are in place as on the 737?
I really do think this 'g/a' theory is a red herring, certainly in the part we see on the video.
Firstly, on the 737 the throttles are 'locked' when reverse is deployed so they cannot be advanced until the reversers are 'stowed'.
It follows (737) that g/a thrust cannot be applied until the reversers are both stowed.
There is no sign of cancellation of reverse on the video.
If we are to blame the engine handilng for the swing, is it not far more likely that 'firewall' reverse thrust was being applied on number 1 as the run continued, thus causing control difficulty on a less than ideal surface?
Are we now agreed that reversers ARE important stopping mechanisms on slippery surfaces - or is the AB MEL different? I shudder to think of new pilots thinking it 'doesn't matter'.
Regarding the runway, Rippa in #126 suggests it was 'wet' but not 'contaminated'. Was it 'slippery when wet'?