I think its pretty fair that they're weighted differently. However not knowing at all is a bit of a pain. That Shurado could be .0001% or 2%..i Have no idea. on my new server i've seen about 5 people win it through 2 event cycles..but still.

I know someone will say. omg bad business no way theyd tell us. Lets just thank our players(like me :P) who spend way too much and show others the odds. Like how i tell every new player OMG please dont think you'll get a super rare character with 1 10pull..:x