The big change with this patch is the Smelter workshop. The Smelter can turn various metal items into bars. Smelting takes an item and a coal, and non-metal parts of the item are lost in the process. Smelter jobs can filter items by quality and will prioritize worst quality first when “at most” quality is selected. For example, creating a smelt sword job on Repeat and selecting “at most average” will smelt all poor quality swords before smelting any average quality and will ignore swords of higher quality.
This patch also fixes a handful of bugs which you can find here.