I will still likely fly BA if i could be assured there would be no disruption, and i mean long term, i generally book months in advance. And whilst in the past on rare occasions i have let thngs slide, i don't think i would be inclined to do so again.
What i would do if i was WW would be to institute a secret flyer program, not just in First/Business but in cattle class too.
Dibs on first application