One example could be, after 50 str you unlock the ability to travel at the normal crawl speed instead of super crawl when carrying a boat with 2 objects inside, or after 50 intelligence some sort of scanning mechanic for...fish...or something...I'm sure the forum has quite a few ideas it could think of adding to this small list

There could also be multiple choices of feat's for each time you unlock one, putting some small amount of specialization into that character.