The first release in the pre-release series makes some small balancing changes and improves some of the AI path-finding and decision-making.
Work now begins on the pre1 release which will mostly focus on fleshing out the item inventory and crafting mechanics but will also further improve the behaviour of the AI to make it seem a little more fluid.
The pre-release roadmap shouldn't be considered very concrete and more of just a rough sketch of priorities and how they will be batched together. Ideally, these releases are frequent but that will depend on usage (if there are users, it would make sense to update them frequently in order to shorten the feedback lag).
I will post more as work progresses and difficulties are discovered,
Jeff.