I'm still befuddled; the docs make it sound like you can grab classes without knowing their names, and thereby can dig out and modify pretty much whatever you want (which would be great, I'd love to be able to customize how some of the really low-level code works, change some basic rules), but how can you do that if you don't know the names, and how do you get it back in a format you can analyze and write new code to modify?
Sorry, this is probably RTFM stuff, but I'm not used to this kind of approach; it sounds like it'd let us mod practically anything, which is a neat idea, but I can't see how that wouldn't let us do dangerous stuff like get open access to the file system, or attack people via bloating their savegames to thousands of gigabytes with junk data, etc.
If that stuff wasn't possible, it's not a big deal; it's a SP game, if a mod doesn't do something awesome and entertaining with that ability, then it's not an issue, same with the reverse, because either way they need to buy the game to play it, which seems like a win-win for Alex.