Bleach rps are a bitch.
Personally I can't agree to what blackbeard says, but regrettably I must admit that he seems to voice the general opinion of bleach-players.
Frankly I enjoy smaller groups, it gives the characters a better chance to interact with everyone and you can build better relationships. Also, the story is easier to follow because there isn't 20 posts of useless shit about a group in the other end of the world between the posts about you/your group.
However, many players seem to love the large/huge groups, so there must be something about it that works. For one, the drop of a player gets hardly noticable while it may end a game with few players.
With that said, I must also criticise the way Blackbeard thinks. Throwing the game away because of group size and presence of fringe "races". It's what I like to call conservative gaming and it is the reason why some genres stay the way they are, and others doesn't stand a chance. The pure thought that "It should be like it was the last time I played because that's the way it's done".
In my mind rping is about discovering new things, putting yourself into situations where you yourself could never be and do stuff that you could never do.
If you only join and play games that are exactly what you like every time you'll end up stuck. Suddenly everything is predictable and homogeneous. Playing games that take you out of your comfort zone every now and then is a great way to keep your mind and preferences opend and loose. Sometimes an unfamiliar setting can be the most fun, because you can't fall back on "solution #57", everything must be done from scratch.
And to give the GM something to think about. While you had the world pretty much set in the op, you didn't give players much to base their first posts on, which is a huge turnoff for many players. Personally I try to set a situation which the players can react to and base their first post on. Pulling a post out of almost nothing can be very hard and may take quite some time. Not something you want right at the beginning of your game.
Those are my two cents... I'm still around if people want to play.