The City of Steam page has been updated with a new blog post that gives a sneak peek at upcoming changes to the crafting system in the next patch. According to the article, the crafting interface will be simplified and made easier to understand, among other significant changes to the crafting feature.
In 2.6.1, we will overhaul the Crafting system; all functions inside it will be reworked and the new interface will be more friendly and easy to understand. Catalyst will be completely unnecessary in the new Crafting system but we are not simply removing it -all Catalysts will turn into something valuable instead.
Read the full post on the City of Steam page.