It would be interesting if BA tried to appeal to existing and potential EC members in markets where they do not hold a monopoly — ie. not the United Kingdom. As a means for attracting people to the FF program who live in the USA, Asia, Middle East, Africa it might make a lot of sense for BA to have better earnings based on distance not spend — specifically so they can attract people from other programs (AA, DL, UA) etc.
But maybe that’s all wishful thinking