First, he talked about the people claiming the game is downgraded, which isn’t the case here at all. The newer build, which is just 3 weeks old, runs with a lot more post processing effects as detailed in the screenshot below. (Source)
Andrea Pessino explained (Translated) that the new build is a lot better and how the frame rate is a lot more stable now.
Quote:
The game is now more detailed, dynamic and complex than it has ever been. Of course it’s not finished yet and certainly we’ll be able to get better performance before the release but in most cases, 99.99%, the frame rate is already solid and complexity is superior to what we promised. I’m sorry you’ve to see the game in such a terrible and low quality footage. If everything goes well, this situation will be fixed as soon as possible.