Like Acken and Jon Shafer said, DLL source code on release. Gimme gimme. Definitely wouldn't mind some easier multithreaded support within the DLL as well. I tried messing around with OpenMP for Civ5's but basically ran into a brick wall. A multithreaded A* pathfinder would also mean faster turns (seeing as the pathfinder is the main performance bottleneck), and that we could get the AI to do more complicated calculations, maybe even think an entire turn ahead tactics-wise.