I know many people dont like reality in their fantasy but I just thought I would stick some RL experience in here since most of the comments lead me to believe no one here has ever used a whip.
Whips are very difficult to use. They take years of practice to get any form of true "proficiency" with them. Even learning to reliably "crack" a whip without taking off your own skin in the process or without tangling the whip takes quite a lot of practice. To get accuracy to actually strike an intended target - thats a whole nother ballgame. Swords are childs play in comaprison.
Yes whips can do a great deal of damage to someone when used correctly, however, they will do no harm through any form of firm armor like plate or leather and only very limited damage, if any, through armor like chain or even heavy robes.
The fact that a whip does not threaten is appropriate. When you wield a whip it requires a "wind up" to get the whip to the inertia needed to do any damage and the whip itself requires free space to prevent it from tangling and becoming ineffective. On top of that, only the tail of the whip causes any real damage (laws of inertia). Due to these factors, anyone that gets close enough to threaten you cant be threatened by the whip unless you use a rule to say the handle can be used as a sap. Otherwise it would be like flogging someone with a peice of string or a wet noodle. For the same reason, being classified as ranged is accurate. Only the tail of the weapon at 15' out will cause damage, so it is in effect, a ranged weapon.
PS: As for Shuriken, some of the rules behind weapons are just glossed over for easy. Otherwise you would have to impliment Weapon Size / Damage Type vs Armor Type rules...
Just a few thoughts from someone who has used whips (as a novice) in the past to perform with, both western style and renaissance (10' string whips to 15' bull whips).