It'll be interesting to see what they do about modding, since they absolutely MUST support it. The power of modding the Java version was that you could relatively easily replace in any part of the game. With a modding API, you're restricted to whatever the API allows you to do.

I wonder if this going to create some bizarre fork situation, with an MS-approved-and-bound C++ version and a legally questionable, community-maintained legacy Java version.