Uh, yeah (sorry, we are in the CODA thread).
Ferocity is basically a triggerable beserkable ability that Klingons have. Granting them +1 Health (similar to toughness in ICON, but tempoerary) and +2 to thier Armed and Unarmed combat tests. They also have to spend a courage point to snap out of it.
Honor is another ability. There isn't much a mechanic to it, just that there are benfits in social situations with Klingons if you are honorable and have a good reputation. It is similar to ICON's Code of Honor trait.
In game play these two traits will tend to promote "klingon personality". Of course, both traits wouldn't go over well in Vulcan culture.
Now while these abilities didn't exist as such in ICON, similar effects did. For instance, Wolf had to deal with both the Klingon and Starfleet codes of honor due to his mixed heritage and that led to a lot of difficulties.
A lot of the drawbacks to certain species and mixed species are necessarily in the numbers but in roleplaying. Even "prue-blooded" Klingons are going to have problems advancing in a campaign, due to the greater degree of violence in Klingon culture.
Game rules (like CODA's new ferocity trait, and ICON and CODA's Bloodlust trait, common to Klingons) wil help to ensure that one the fighting starts it isn't going to stop until bodies hit the floor.