I agree with Swanhunter here. While seating preferences on short haul flights is in itself not a big issue, when combined with the drip drip effect of the steady stream of changes coming through (e.g. the recent change to through check-in of luggage on separate tickets) it has reached the point where I have decided BA and oneworld doesn't deserve my loyalty.
I'm GGL/CCR this year and will be again next year. I'm pretty close to GFL. But I've already decided that I won't go out of my way or make any special effort to earn this. This isn't an "I'll never fly BA again" rant, I definitely will. But if another airline/alliance has a better deal, they will get my business from now on.
BA needs to think more about the customer experience and think a bit more about rewarding loyalty to individual higher value customers, not just Corporates. It makes no sense to me that some Corporate customers are being given seat selection on HBO, while an individual at Gold/GGL/CCR level doesn't. I know KARFA will be along to remind me that Corporates are worth more than my business, which is true at aggregate level. However, when you are earning >5k TPs per year it's a bit of a slap in the face to be denied benefits being given to corporate travellers (who individually may be infrequent flyers without any BA loyalty/status). But if that's what BA wants to do, it's their choice. Just as it's mine to move my business elsewhere for some of my travel plans.
So
There is a fault with Amadeus that BA have been aware of since June... Seems unfixed so far judging by these posts, but with 'fly' in meltdown I hear, maybe there are more pressing issues.
Most corporates travel is not so wedded to BA short haul. Often non BA booking is allowed within a time frame difference and few corporates will push back on anyone choosing Ryanair or Norwegian at half the price. As a baec close-ish to ggl for life I have largely given up BA short haul as punctuality and schedule are often poor, the present IT backdrop is poor, and the whole hbo thing was the final straw.
Finally, a U.K recession is coming. Soon. I suspect BA will squirm to try and win back business but by then travel habits on what so far seem to better low cost airlines will be hard to break.