Huge +1 from me. It is a good way to make INT less of an obvious dump stat in that if everyone has at least decent INT they'll be more likely to pass the necessary check.
It would also make Nature checks a bit more useful and less situational.
If we're very concerned about it only being good for your first run maybe successfully passing a knowledge check on a creature gives you unique loot, as you've recognized what the valuable bits from the monster are and know how to harvest it.
