It's a big update for us, but there's a lot of stuff that's behind-the-scenes so won't be obvious (or interesting!) to most players. For example, all strings can now be translated, which meant a fair bit of time was spent supporting the large numbers of CJK glyphs required. This is the first build we'll release with the audio synchronisation code running, which took waaaaaaay longer to write than we expected—but without the actual audio the visible changes are minimal. (On that note, this will likely be the last release before the audio goes in.)
There is one significant bugfix in the passenger pathfinding though!