Quote from Papachabre
Imagine that - content was added that brought new bugs that have to be fixed. Why not work on fixing some of the previously existing bugs instead?
That's a pretty poor perspective. Besides, they regularly have bug fix patches. This is useful content that opens up a lot for modding and adventure maps and the like.
Besides, it is just one snapshot out of many, all of which create a single "update." They are merely doing us the favor of seeing what they did this week.