If LH can swallow selling BD to IAG, then it is seismic in terms of BA's history.
The mood music at BA has definitely changed from cuts to investing in the brand and products/services. If this was coupled with the growth in the route network that 787s and bmi's slots would allow, then whilst BA will probably never regain the title of "the world's favourite airline" at least it will be out there fighting to compete rather than in retreat.