I think mt group may have stumbled upon a difficulty in the Career transition rules...
Since Reiklanders reduce the cost of Career transition by one, this reduces the cost of switching Careers to zero so long as the two Careers have three traits in common (WFRP p38).
Given the huge number of Careers that have three traits in common, this means that the Reiklander could practically switch Careers after each session, shopping around for the Skills, Talents, and Action Cards they want most.
Am I missing something here, or is this potentially unbalancing if you have a player who just wants to grab a few skills he would not otherwise have access to?
http://manyeyes.alphaworks.ibm.com/manyeyes/visualizations/wfrp-career-by-careers-with-3-trai