Okay, maybe I'm missing it in the core book, but what are these Major Bonuses you are refering to. Saying 1 Physical and 1 Mental doesn't really explain that by the way. Please some examples would really help.
Also if someone knows how to do the new characteristic checks please explain, I really hate the roll low rule in the original rules, its just stupid. I have read the other forum regarding this, but NO one actually explained it. They were always very vague and didn't explain how to actually make one, or maybe I just didn't get their explanations.
The Natural Bonuses he's referring to are when you go up a level, adding the Ability bonus to your skill again. Used to be you picked one skill at every level to do this with. Now, instead of one skill, you pick two, one physical skill and one mental skill. So, if something is modified by your Agility, and you have a modifier of +15, and you assign a Natural Bonus to it, instead of your Agility adding only +15 it now adds +30.
The new Characteristics check is just going the other way, instead of rolling under, you now roll a D10 and add your Ability score to it, trying to achieve a certain result or above. I think, if you roll a 10 it counts as a 12, but don't quote me on that. To be honest, these checks come up so rarely in my game that I don't use the rule that often.