I think this is a ****ing cool idea, you get achievements but they actually do something and I know jack **** about the Mii

Imagine beating Omega Weapon and having his doll sitting in your home (sorta like the pirate den from FFXII)

and I don't give and flying rat's ass if it's a ripoff or not, other console(and correct me if I am wrong) ripped off the PS2's vertical stand, L3/R3 and DVD player and besides isn't the whole point of progress is to take other's ideas and improve them