While BA have no trouble getting the numbers through the door, those that have passed their "irrelevant" tests, then I doubt they will change anything in their recruitment process. Why would they? The system has worked for many years now and has provided BA with what they need and want. People saying that the selection is irrelevant or dated or anything else are still missing the point. BA are getting the numbers through the door with no problems, occasionally they relax their criteria but that merely tells you that they are still, usually, able to cherry pick from whoever is out there. When that small pool is exhausted they widen their criteria a little. It does not suggest that there is a recruitment problem.
As I said before the problem is capacity in the training system not in getting people through the door. The recruitment requirement this year is large and some if those that come in will probably do some external training but this will be minimised by taking type rated people first.