The title kinda says it all. KCC allows any failed recall knowledge check using one of two skills to be retried using the other skill.
For a bard with bardic knowledge they could chose bardic knowledge and occultism as their two skills. At level 4, when KCC can be taken, this allows player to recall knowledge on ANY subject (with -2 difficulty to DC) and on a fail then retry with occultism which could be expert by then. This suddenly gives a power level a normal bard has to wait until Lv15 when they can upgrade Bardic Lore to expert for the cost of a single skill feat.
This just seems ridiculously OP. What do people think?