I'm wondering if experience was intentionally set too high. My "slow with 24 XP kicker per the module" group - in half the Rōnin's Path adventure, has pretty much all qualified for rank 3, except for being mid adventure, and they're likely to be able to "Snap to 4" by holding off spends until they can go train.
My "Nokicker, fast playing" group... they're well into 2nd, as well, except that they haven't gotten training time.
I am hoping the experience rate was set high for playtest so as to puch characters into the stratosphere... if not, I expect it to be heavily houseruled.