Then why the full support only for directx 11 graphic cards and no full support for directx 10, 10.1 cards that much people still have? The directx 10 plugin doesn't work well with cards like mine, one Radeon HD 4870 1GB. Much slowdown and many audio and video bugs. In particular in Naomi 2 games. i think that a developement of a true and totally compatible directx 10 plugin would solve the majoriy of the problems.
My specs are:
Intel Core i7 920 2.67GHz
Radeon HD 4870 1GB
12GB DDR3 1866MHz triple-chanel