[southblue]

I'm not generally a fan of deliberately splitting the house. I'd much rather see divisions happen naturally.
However, I wouldn't mind seeing 2 different houses from the start - as long as each house were unaware of the other's existance. I don't think this would be possible though - It would be a logistical nightmare and there wouldn't be enough time to build a second house or keep it secret.
I think it would be safer not to have any complicated twists at all - there will be enough changes this year already.