So, I've been wondering - how debalancing would it be to make all the skills available for all careers and specs? Currently the system discourages from interesting experiments, for example a martial artist politico, since paying those extra xp for brawl ranks is just well... discouraging. And I don't think it is power-gaming etc. - it's just a skill, doesn't make the character a one-shot-killer.
Or take a look at the Marshal - lots of hard headed in the tree, but discipline is not his skill.
But perhaps I'm not noticing some obvious rationale - so what do YOU think?