I have a couple things for you today:
1. Apparently, longbows are 1d8, while short bows are 1d6, so the arrows aren't inherently 1d6, the bow makes them so. That makes a lot of sense considering how much more range they have.
2. Arrows will break whenever the unmodified hit roll is less than 5, even if they actually hit the target, they are always new condition otherwise.
3. Exhaustion affects proficiency and speed, it will not affect AC nor can it lower proficiency below 0.
That's all for now.