With the 3 ways to learn ingame (learning-by-doing and a percentage chance to improve your status, schooling or learning from Natives) I find the learning by Natives method to be a bit unbalanced. Schools need to be built and pupils maintained in them so that way costs building capacity and food and some time, learning-by-doing takes much longer due to the low chance, but costs only the difference between having a specialist and the unit actually doing the job. Learning from Natives in my games seems to be completely free, with guaranteed success (at least I do not remember to have ever had an Indentured Servant/Free Colonist drop out of the village and fail). Which is worse, it seems not to be limited. In my current game I had the luck to have a village with Fisherman specialists (at the coast near my own colony) and I carried a dozen Indentured Servants there. 12 Indentured Servants asking to stay in the level 1 village - no problem, all were welcome and the villiage stayed level 1... I suggest to (if that is possible) to: - add a low chance that Indentured Servants may drop out of the village, e.g. by "accidentally insulting the Natives due to their lack of manners" (after all Petty Criminals are not allowed at all into the Villages and villages can temporarily boycott you from trading when you nag them too much about bartering); - either have a hard limit on how many colonists can live with the Natives in one village (e.g. "village level 1 = maximum of 1 colonist living with the natives) or have the colonists that live with Natives be actually used by the Natives during their stay (e.g. making that village a temporary level 2 village - or in my extreme example from village 1 to village 13...) so that not only the colonsits learn the specialty but the Natives have an advantage of their stay too and are able to harvest/hunt more, - have all native units you can get be unable to learn from Natives: Most native units (e.g. native slaves, native mercenaries) are already unable to learn from Natives but "Converted Natives" you get from missions will appear in one turn in the vilage from which you just converted them - and right in the next turn you can send them back into their own village to become a specialist - which contradicts everything historical about the spanish missions and reduces "Converted Natives" to "Converted Natives for a day" because you can turn them into specialists immediately (if their village has a needed specialty, if not a few days longer). All natives units you get under your control should be unable to learn from Natives, because by joning you and the christian faith they have turned their back on their ancestral ways and are striving to join your colony and get schooled or worked to become educated.