In Fallout 1, 2, 3, and NV, your intelligence determined how many skill points you received upon levelling up. This was kind of a problem.
I am not against the idea of Intelligence having some effect on player progression. But in every game in the series so far, I've had to max out my intelligence just so I wouldn't get utterly destroyed by the enemies who levelled up with me.
An intelligent person is able to absorb and process information faster than a dumb person, this is true. But I think it would be best if Intelligence had a more tangible effect on experience gain, as opposed to skill points. You'd level up faster, but you wouldn't level up STRONGER. Otherwise, there's no reason to play as someone who isn't a super-genius.
I'd like to play as a character with above average intelligence (like, 6 or 7), but If it weren't for the skill point issue, I would give my character more charisma than anything else.
Of course, if FO4 is using a skill tree system like Skyrim, with one point granted per level, this might not even be an issue.
Any thoughts?