Maybe it doesn’t really matter. Airlines will decide whether to follow the manufacturer’s guidance or not. Somewhere other than BA I fly with F/O’s who experience varies from 300 hrs and three months to 10,000 hrs plus and fifteen years experience.
I’ve never once had one of them moaning about not being allowed to call stop, and nor did I worry when I was an f/o. We just get on with it and abide by the SOPs, a bit like calling “positive climb” not “positive rate”. Just because BA choose to train their F/O’s to call stop doesn’t make the training better, it just makes it different.