I am revising again the attack tables in CC, leaving out the magic, for weapons I see that is great, I though that some weapons was much lowered in power, i.e. war hammer uses type III, but looking at tables (Bashing in this case) we see that is correct as this table is in 2-handed weapon scale directly, is not like blades, where long blades are for 1-handed and great blades for 2-handed. So I apologize for my mistake in this case.
But, in the other hand, if not a great adjustment I see that a little adjustment is needed, in the way for compensate weapons. In bashing attacks we have good examples, tonfa vs. war hammer, if both have the same FR and type, why war hammer have -15 OB, it should use the same -10 than tonfa; nunchacku vs. pick, who will be the one using nunchacku, if it has greater FR with greater penalty OB?, so IMO nunchacku should have a bonus to additional attacks in the way that it has no penalty (the -20 one) for the 2nd attack (but it will have a -40, -60...for next ones).
We have cases, like in bows, where the advantage of long bow is greater range than composite bow, so it is correct.
As summary, all weapons should be compensated to others, if there are clearly better weapons (and more in the same category), then there is no reason to develop the worst ones.