The point of type4's is this: as we have intended all along, type4 govts (i.e., "allied govts") should be used in cities that already are very large and have good local recruitment different from your faction. If you are romans and you take Syracuse, you might use it. If you are Getai and take Athens, etc. That way you don't have to build them up a lot - you get a "free" general to help control them, you get the best local MIC's possible, and they make you lots of money with (generally) trade bonuses. Don't use type4's for provinces with a similar culture to your own. And don't use them for small cities, since you can't build them up as large with the maximum number of your faction buildings. This new addition makes all of this even more "perfect" in our minds. Plus we changed the "allow ai local taxation" sliders and buttons to "allow total local autonomy" and such, to further clarify these things.