I'm still digesting the core rules but see a few areas which could be further expanded. In particular there are 3 general skills where specializations can be developed in Libram Novus articles:
Crafting
Lore
Performing Arts
Of course each GM can decide the characters range and scope of each specialization for their campaign but providing some examples would be cool; for example, perhaps Crafting(Blacksmithing) would provide guidelines as to what a character can craft, time to craft, target numbers, crafting exceptional weapons or armor, etc. If developed sufficiently, perhaps repair rules for armor and weapons which can be tied into new optional weapon and armor breakage rules.