Well, they filled AC's spot, and created a new one for all intents and purposes.
Sheldon's future is still in doubt but we won't find out about that until the proxy material goes out, allegedly in late May. They will then announce their intentions regarding Sheldon and any additional personnel they feel are required. I don't believe that anyone else would be departing at this stage of the game.
Personally, I don't see the need for anymore bodies at this time, but there is so much unknown that I could be completely out to lunch.
Tick tock...