The new Guinsoo's Rageblade doesn't work on Shyvana and the 6.10 changes don't change that.
I am one of those people that has been building devourer into trinity force into titanic hydra for a very long time. When devourer was taken away I experimented with the new rageblade by going bloodrazor into rageblade into titanic hydra and found that this build lacked some serious damage and made her extremely squishy. I then decided to go back to building trinity force but with the bloodrazor and have found a lot of success.
Overall Trinity Force is a better item on Shyvana in every single way even though it is not intended to be built on her and as long as Trinity Force is an item, even with the AP ratios there is no comparison to Guinsoo's Rageblade. The new rageblade is possibly one of the worst items to build on Shyvana and even though the "devourer" passive was SUPPOSED to be a part of her kit, the item itself is so bad that it's not worth the sated effect and you're better off building an item that gives better burst and sustained damage while maintaining relatively tanky (trinity force).
I realize that Riot is trying to make the new rageblade a core item on Shyvana but as a Shyvana main who has played Shyvana for a very long time I have concluded that even though the item has a cool idea behind it it just does not work on Shyvana at all.
Riot needs to find a way to make this item work on Shyvana and be more viable than Trinity Force. The AP ratios in 6.10 make me cringe because those minuscule and almost worthless stats don't justify buying this terrible item.
Please Riot, do something. Building Bloodrazor instead of devourer feels wrong. Shyvana was MEANT to have the sated effect, please give it back to her.