You are right in what you say Carabean boy.
I believe the basic salary for Mixed Fleet CSM is 24K.
I think savings could have been made with an integrated approach because it seems mad to have CSDs (and for that matter Pursers) on E/F without work but being paid and then take on CSMs to do the same work that the CSDs could have done had new entrants been taken onto current fleets. However we have the Bassa union to blame for not negotiating on that.
Of course I do fully understand all the other reasons, new ethos, be outstanding etc etc, but I still question whether a low paid and tired workforce will, as time goes on, be all these things.
Time will tell.
If BA can't get as many CSMs as they want, as fast as they want, the result will be that some current crew will just have to wait longer before being offered the promised part time, that's all. Mixed fleet could just grow a bit slower and use it's own Future talent crews which would at least be good for them.