Hearthstone uses D3D11 but the implementation of D3D11 shipping with Crossover is broken to the point where it breaks the game. Can the Hearthstone Crosstie be modified so D3D11 is disabled by default? This will force Hearthstone to fallback to D3D9 and it will simply work right after install. I uploaded a YouTube video showing what I had to do manually. I hope it can be done auto-magically with a fixed version of the crosstie.
https://www.youtube.com/watch?v=xw7W7289KGs&feature=youtu.be