If you ask me, we should remove any reference to intelligence from RPGs. And I've actually thought of how to do this a bit, using the standard dnd set.
Instead of INT, WIS, and CHA, just have two "mental" stats: Focus and Influence (FOC and INF). Focus is your ability to memorize and recall information, as well as your ability to concentrate. Influence is your ability to persuade, blug, beguile and intimidate.
Then have ALL stats be things you can work on increasing every level.