I've tried searching for this topic and failed, but...
I've never understood why this weapon exists in game. Do you throw them faster? Can you throw multiples at one time? Is there any reason anyone would ever take any Enhancements for this aesthetically pleasing but mechanically depressing weapon?
I'm already aware of all the 'ranged is broken' discussion - but even beyond that, the purpose of shurikens totally avoid me unless there's some special enchantment they can come with that other throwing weapons don't get.