Based on what I saw it clearly states that Ventress Returns to her home planet of Dathomir after her defeat on the Seperatist Dreadnaught and goes into hiding to re-evaluating. However, Ventress Ally has forsaken them to know that they want Revenge over Darth Tyrannus.
Upon doing so, Kit Fisto and Jedi Knight Nahdaar Vebb goes to the Moon of Vaseek 3 system to kill Grievous. Therefore, they failed and Grievous still lives.
Based on this summary of the refocused narrative, it would be best to rename this episode to Vengeance as it suits the narrative as a whole.