Thank you for your research and finding the unrelated text bug.
Generally speaking a lot of values in defstats, AI related or not, are not used by the game at all. also because behavior is very random and maps are so different some people might change them and notice a change ingame while in fact nothing changed.
I'm not sure you tested the bold-text suggestions in Doku HoMM5.5 remod
but I will keep this under consideration for further testing later on.