Meh, he grips him by the throat in a bladelock, then manhandles him as he's done in the past.
Hardly indicative of a massive improvement, his unpredictable anatomy is not a new feature. And certainly not something that would work on Savage.
EDIT: Almost exactly the same as this, yet he goes for the face instead of the throat, and gloats instead of pressing his advantage.
So Grievous is just... not stupid anymore I guess?