More balanced mods as in, mods that are more balanced, or the quantity of mods with balanced trait costs will be larger? I think we may be reading it with opposing meanings of "more."
Really, it's a trivial thing to include PvK Balance Mod in your SE4 mod. Any modder that does not either does not know of it or is just lazy.
Ideally, Aaron should have just made the stock costs balanced in both games. But alas...