You don't need the .xlsm files in the mod itself. The stats that the game uses comes completely from the Stats/Generated folder (except maybe the Recipe/Item combo list, which aren't .xlsm files). The .xlsm files are useful for knowing which values go where, but they don't need to be in the mod.
I've been getting by just fine making the Generated txt files directly.
Well, fuck. I placed Character.txt and SkillSet.txt where they belong, but only Madora seems to have some changes and it messed up the changes I made.