I dunno, having people pay for something that's already in the game is kinda cheap, isn't it? :\
Then again, NBGI has done it before, huh? OTZ
I could understand if they released a "DLC" patch sort of thing that allows you to use those 4, like if they were really left out because there wasn't enough space on the disc. I don't think people should have to -pay- for it, but...NBGI.
After looking at it, they really do limit RK use by a ton. No trio with Ami, Mami, and someone in between D: I swear I hope they're holding out on us and going to tell us there's some sort of souped-up office mode.
edit: unless they're trying to hold out to make L4U2 D: