This wasn't the point I was actually remarking on but I will address it as well.
Int is a terrible stat for role-playing. Terrible. Vague and nebulous. You could argue strongly that idea generation is only a part of it. And that someone with low int could still generate good ideas, just be bad at all the other aspects of it.
Do you say to one of your players you can't play someone above int 14 because that's what you are?
How do you role play someone with high int? Say 20?
Do you give them ideas their char would have thought of? That's not RPing, or do you make them roll for the same, that's not role-playing either, but rollplaying.
Playing a low int char is difficult, but if you make people play char with int they can RP continuously, then you will never have very high or low chars. Defeating the object of having it as a stat at all.
The subject I meant was the improvement roll modeling and changes to it.
Also gaining a tick when you succeed at a skill isn't learning from success, it's a chance to learn from failure, which is what the actual improvement roll is, you fail the skill roll, you improve you skill.