With the current rules, it takes an absurd amount of turns for the colonists to learn even basic skills like lumberjacking. You shouldn't get punished just because you get your first schoolhouse up and running early and use it to train carpenters and farmers. In my opinion it's idiotic that you should avoid using the schoolhouse/college/university just to save it until it's time to train elder statesmen.
Basicly, if you train one or twenty carpenters back in 1550, it shouldn't affect the efficiancy of your university 100 years later and it should definately not lower the efficiancy.
Basicly, if you train one or twenty carpenters back in 1550, it shouldn't affect the efficiancy of your university 100 years later and it should definately not lower the efficiancy.