Looking at the rules on Passive Skills, it says only that expertise grants a +3 bonus, which I assume is taking into account the average roll of a d4, rounded up in the same way as average health is.
However, expertise isn't limited to a d4, so were you to increase expertise in Insight from a d4 to d6, would the passive bonus increase from a 3 to a 4; or is the intent to keep it at a +3 regardless of die size?
However, expertise isn't limited to a d4, so were you to increase expertise in Insight from a d4 to d6, would the passive bonus increase from a 3 to a 4; or is the intent to keep it at a +3 regardless of die size?