Obryn
Hero
Well, I combined all of the various "+2 to two Skills" feats into one, overarching Skill Development feat. (I'm not happy with the name, but it works, I suppose.) For skill-centric players, there's also Skill Focus and (my personal favorite), Skill Training.For a pbp game that I've been running using d20 COC, I added and adjusted a few feats from d20 Modern so that characters who concentrate on intellectual persuits will have more interesting development options.
http://www.enworld.org/forum/2554113-post9.html
Your players might find these options fun.
Job.
Skill Training gives the investigator a healthy amount of skill points, but they're still limited in the number of ranks they can have in a single skill.
-O