On the basis of comments by Keith Williams (to the effect that the major legacy issues have been addressed) and recent and current recruitment (Frank Van Der Post for example) it seems that there is to be a renewed investment in the product and service (catering improvements are coming in May) and a focus on growing the business. Cabin crew are obviously a big part of this and I suspect one reason why BA has allowed this to drag on for so long instead of forcing an end is because it knows it needs to pick up the pieces afterwards.
BA will have monitored forward booking trends as well as tracking perceptions of the brand amongst different groups and seems comfortable with the current situation and this seems to be borne out by the traffic statistics.
I take the point about managers getting out and talking to staff but if CC has been allowed over decades to become a separate empire within BA and BASSA (to give it some credit) has positioned itself as the sole source of the truth, this is not going to be reversed overnight. One of the major differences on Mixed Fleet is that the CSM is an actual BA manager grade, thus they are "management".