Difficulty, weapon damage, PT, and accuracy affect accuracy in various ways. Why it works like this? No clue, maybe just to add more complexity.
When jarids received a 3 point decrease in damage and 6 accuracy increase, it was as if the accuracy was increased by 10 if you compare it to its old accuracy. Messing with throwing requirements means messing with accuracy, too. Requirements are already pretty low outside of the 6+ PT weapons. You have access to 39 blunt at +3 at 3PT. The only weapons that I could see having reduced difficulty are throwing spears, the throwing lance, and some of the weak cut throwing weapons.
Right now, a throwing weapon deals similar damage to a non-held melee strike of the same stats -2 damage or so. I think throwing should receive a hold bonus with a slightly decreased maximum multiplier/penalty and tweaked timing compared to melee. The extra timing aspect would provide some more power for good throwers outside of rapid fire throwing while reducing the leeway for just holding your aim forever.
Unfortunately, speed bonus had to be reduced since that ended up giving cav ranged much more damage potential than than their on-foot counterparts. There is still a sizable increase, but the gap isn't as large. Cav have some weird head hurtboxes. I remember a few times when I threw a weapon into a horse's eye but didn't see any extra damage (was using the in-game calculator). I said it in the other thread on suggestions, but I would like to see something like 50-70% armor for the legs and head instead of the 0 armor on the legs feature.