What should have been done with Maul and the Sith
After Maul killed Qui-Gon and force pushed Obi into the pit he should have left him for dead. That way Dooku would still be vulnerable to be turned to the darkside and lead the Confederacy. And to prevent them from knowing about each other Sidious would do what he would evetually do with the Emperor's hands with Dooku and Maul