Villas,
The dispute is can you do it from 100ft or 200ft? Airbus does not recommend it and the reason is stick out of neutral is rate of roll demand. If you want to do it ask the airbus
How much side slip do you think you have with a badly trimmed aircraft during an engine failure on take off? Even with a big side slip, the bank can be held constant with neutral side stick. The tail doesn't fall off either.
At some time or another, most pilots will have flown the Airbus sim with lots of side slip and not realised until spotting the Beta target / slip indicator. You don't need constant aileron to control the slip induced roll. The computers are doing it for you.
What do you think the FBW computers are doing differently when side slipping at 2,000 ft with all engines at symmetrical power and flying with the slip indicator not centred during EFTO?