I would disagree a bit.
Xbows already deal enough headshot damage that they often 1 shot, so this doesn't really do anything for the upper tier xbows other than nerf them (overkill on headshots, but less on body shots = less damage)
For bows I also slightly disagree, wpf get so incredibly expensive that going for more wpf than most archers already have is useless, I forsee more longbows and rus bows as they have better accuracy and faster missile speed.
As for throwers, I agree.