Somehow, I didn’t notice it in the words themselves, but “special equipment” is a deceptively complex idea. The new equipment chapter will probably focus on two entries for each piece of equipment: actions and concept. These things are a little too diverse to standardize anything else.
Actions describes how to use each item, and what/how many actions are necessary to use it.
Concept is the gear’s description and the useful details.
However, the power of each piece can, so far, be translated into the inherent power of a character – whether that power is related to attributes, skills (specifically spells), or perks. Counting these up is a good way to measure the gear’s level, which can be compared to character level for balancing purposes.