Although I look down on everyone who doesn't fight in melee, I can't appreciate this change.
I think the predictions are right: because the average arrow damage got nerfed heavily, but headshots buffed a lot, you have to go for headshots.
Because the damage is so high on headshots, you can live with less base damage, which is a good thing, as you can now rely on precision and rate of fire. You can use the lighter, faster bows, and you can shoot faster, with a much smaller crosshair.
I don't think that ranged spam is going to become better, if anything the opposite.
cmpxchg8b already confirmed, that the problem is to lower the attractivity of the archer class without lowering its effectivity. But this change would be a nerf in the effectivity. The only nice side effect would be that horse archers, who always suffer from lower precision and do less damage, anyway, become completely useless, which is really sweet!
I hope the developers won't implement this suggestion.