AFAIK Meggitt compact autoloader and FASTDRAW autoloader concept permitted to still have 4th crewmember.
Besides this IMHO there should be considered to redesign a bit turret ammunition storage. It does not mean to have autoloader, but placing there a chain ammo rack like in Meggitt solution, with a solid bulkhead and small ammunition port for loader, would increase survivability, it would also eliminate need to reload ready rack from semi-ready rack, and whole 34 rounds would be avaiable for immediate use.
I must say that idea is partially inspired by Merkava Mk4 turret ammo storage with two ammo drums behind a solid bulkhead with small ammunition port.
Such design would be good improvement in my opinion. Of course besides main electrical rotation mechanism for chain rack, there would be simple manual backup.