The reason behind adding this feature was that the previous model has finally became untenable. With hundreds of items, adding detailed descriptions became far too encumbering, making adding and changing weapons problematic, time consuming, and full of errors anyway. Also, with all these formulas, translations became a horrible chore - it's writing the same redundant text upon redundant text, but now in every language on Earth.
So, the hand-typed stats had to go, period. Either we use the extra info window, or we just ignore secondary stats - have fun diving through the rulesets.
But I wish you all the best with your mod. If you really want this (very ungrateful) role, then it is a good thing!