From a short haul perspective as a new joiner I would say that things here are a lot better than the doom mongers make out.
I've been here for just under five months now. The only really negatives I've experienced have been the very variable quality of training at CTC during the type rating, especially during ground school, and the difficulty one can experience in finding out who or which department to contact when various needs arise. It's a huge company and generally rather impersonal, but I'm used to that from my previous employer. You won't see the same people very often, and in terms of cabin crew there is generally very little interaction with crews generally swapping out on every other flight.
However, apart from those minor gripes my experience has been extremely positive so far. The actual training done at BA has been excellent. The variety of trips and ability to trade with colleagues and open time means that I have been able to get exactly what I want and need in terms of schedule every month. I've been on the line for three months now and have had two blind lines and this month I have a trip line. I've managed to get day trips almost exclusively (which is what I want), and I'm averaging around 14-15 days off per month. For December I've got 18 days off without using any leave (but I did use clash and protect to get an extra three days off). 8 of those days are in a row over Christmas. If you want tours then you can easily get them, likewise with day trips.
I feel more rested and better treated at BA than I ever did at my previous airlines. When at work short haul is hard work, and BA hold you to a very high standard, but you are rewarded with a good quality of life and a very good pay and benefits package.
The quick commands seen this year probably won't arise next year, and if they do you will still be paid less than your counterparts at easyJet for quite a few years. But life in the RHS is good and you can forge a career that suits your own personal goals.