Well... good question.
I think that it's a shame that the IG characters are all CC based. It would be cool if you could get officers that made them do rifle drills or something like that.
GW seems to struggle when they try and give character upgrades to shooting units. I've always thought it was crazy that the first two "upgrades" for Tau (shas'ui and shas'vre) make them better in CC, not better at shooting and no boost to LD.