TBH BA could make it PP44 and it'll still be the best offer in the UK IMO. The opportunity to change fleets, massive route network, respect for their staff, roster bidding, reasonable job security, training/management opportunities, good pay and staff travel - these things aren't on offer at many other UK airlines. Sure you can go abroad, but a quick (er) command wouldn't be important enough to make me want to live in the desert.
There's been plenty of doom-laden predictions about LHR command times, but what about LGW. Are they likely to be in a similar 15-20 year timeframe or a bit quicker?