Hitech upgraded the cloud editor and is still tweaking the clouds. Have you ever built a weather system for a terrain in this game? How is a third party cloud program not going to need Hitech tweaking it to shoe horn it into his game engine? Speedtree was tweaked during the 2 years of the alpha\beta testing I took part in. Since AH3 went live, he has still made tweaks to the Speedtree system for FPS and playability.
You could always ask him how the new generation cloud system is coming along.....