I agree with your concerns about dominance Ramp Rat but there are green shoots...of late, there have been more airlines coming in than going out. FR might not pay much but the owners will be pleased with the extra pax for the shops, car park etc, particularly as many of the new routes are leisure orientated who tend to spend more.
What would be a massive blow is if Germanwings went. Then the departure board really would lack variety.
But yes, the sooner BAA go the better.