I wonder if Olympias needs to go away somehow, as she was basically the Cersei Lannister of Hellenistic Greece. Consider, after all that she may have had Philip murdered so that Alexander could sit the Macedonian throne.
Edit: we are also fairly certain that she had Eurydice and her children done away with to protect Alexander’s claim to the throne.
But how would doing away with Olympias help the empire if she actually did (or may have done things) that kept Alexander on the throne? Did she play an important role in causing trouble among the diadochi?