Hi!
In my recent game Humans got that "abilities slowly increasing" event. Since I've been allied with them, and they had only 3 planets, I've just kept an eye on them.
First of all, their abilities increased very slowly: I'd say 1% in a random field every month (4 weeks). So nothing to worry about.
But what was strange they got increase in fields I've never seen before: Crime, Government, Homeworld quality. OK, I understand HW quality, but what about other two? Any clue?

BTW HW quality 4 + planet quality 7 combo didn't work properly: their HW became at one time class 11, but got no new green tiles.

BR, Iztok