1. Good stability with KAI, no more random crashes! I actually got to finish a game with a new build, with an AI, for the first time in a month! Since I have made use of a lot of features that only work in 0.75b, I'm very happy about this- it makes testing game-balance of the use of new features much easier

2. Better framerate! Like, wow! At least 10 FPS gain, and no changes in my settings! I have shadows on 2048, and have no FPS below 40 unless something extreme is going on!
Now, I haven't beaten this thing to death, looking at specific bugs yet... but thus far, I'm pretty darn impressed. This is finally coming together into a very good build of Spring, I think.