indeed, very clear. I always found the cost too high, basically you pay as much (except for the highest cost of unit) if you buy a colonist and have him learn in your university compared to buying directly a specialist, so something is not right here...
Just ask you the question? Do you often use the teaching feature in the course of the game, except perhaps in the very late game when you can't reach Europe? And in any case, do you build more than one university in a city? You'll never need to build a school or college elsewhere anyway, this is pointless... Because it takes too long in time and too much in money...
So in my personal mod, I did that:
a) reducing the cost to teach people
b) augment the teaching point of each building
c) have each building provide a bit of liberty bells. A school provide 1, an university 5 for example.
(c) is interesting because it means people will want to have at least one school per settlement, because you get one bell for 6 hammers. And this makes sense, to have a basic learning structure at least in a settlement. Plus we know historically that educated people are more prone to want more liberty...
I did a bit of the same with churches etc. Basic church provides for example 1 cross, so that every settlement will want to have a church, because here, we get the same problem. At most 1-2 of your settlement will have a religious building, and the rest none. This is not realistic and not interesting, gameplay wise.