Hi guys. Yes there is going to be modifications to the Airbus fleet.
The idea of removing the aft galley was studied and rejected. The galley on these planes are needed for weight and balance. There is now a retro fit to the planes that can now allow for the removal of the galleys, by placing weights aft of the pressure bulkhead.
The A320 will retain its galley, though a bit smaller. The A319 is going to retain a "partial" galley. I haven't heard exactly the configuration for the lavs. The A319 will be getting AVOD, the A320 not. Though I thought there was talk of an "enhancement" for the A320.
Also, if the seating capacity rises above 150, an additional FA will be needed. I believe that these planes can now be operated more cost effectively with the mods.
I haven't heard the configuration of FC/Y seats.
Remember, this is the current plan, however, those plans can still be "tweaked".