Riot JxE from the Render Strike Team here. We're the team that's been refactoring our rendering code in order to clean up the code for our other engineers!
Last patch we tested our new render code path with Kha'Zix and Gromp. We found a bug on a few intel chipsets which has been fixed and we've now turned it on for all Champs, Turrets, Grass, etc. Basically, anything that moves that isn't a vfx.
Please take a look on PBE and let us know if you see any issues with Characters!