instead of a flat 3" range for thrown weapons, base the range on Str/3 with the option to use Str 10 as a default rangewhich is not the part of the post that I expected anyone to object to; I thought people would take issue with equating bow size to range. zornhau disagreed with my interpretation of the physics, so I'll look at it further. However, I can also consider an option:
instead of a flat 3" range for thrown weapons, base the maximum range on 5 x thrower's height, in feet, with a default ideal height of 6 for humans and elves and 4 for dwarves and halflingswhich assumes that a longer reach = a longer arc of acceleration. But another option would be to merge it with the rule for bows:
short range for missile weapons is 1" plus 1" per foot of height/length of weapon used to launch the missileThis option is not as math-fiddly as the previous one, but it probably needs a note to explain that the launcher for a thrown weapon is your hand, with an assumed length of 0.