How difficult will Colonization be for 1440 and onward?

[Yorkites 7]

It has been over 6 months from when we last saw the Colonization mechanic in action, and I was wondering whether there was changes in respect to making it more difficult.

[Łukasz Jakowski 12,948]

There weren't any major changes.

After colonization ends, which takes X years, there's a chance that it will spread to neighboring province.

[Joaoj 95]

In AoH2, in my experiences, AI colonization took a long time to happen, it took about 500 years and only a few provinces were colonized. Another big problem is that colonized provinces did not increase the population or the economy, even building and spending money