If you're overweight, you must have plenty of fuel so what plausible scenario justifies an "immediate visual circuit at 71t" with an unexpected engine out at a high altitude airport. That sort of stuff requires thinking about and a proper plan not just launching into something unbriefed.
Its the scenario that doesn't make sense.
That said, if you flew and landed safely in that scenario and didn't bust anything doing it, then I don't think it especially matters that you didn't fly exactly what Airbus said. Airbus would have a big issue about why it was rushed into in the first place.
I think the instructor is at fault and probably the type that uses their role purely to stroke their own ego about how clever they are.