Well, there's always going to be revisions, tweaks and so forth throughout a series. That's just the nature of the beast when it comes to the television medium. You've got producers, TV Execs and censors who are all going to be asking for different things at different times. No series goes entirely as the writers' plan (often for good reason).
I raged about the series' treatment of the last few Horoscopes a while back and it was pointed out that in order for Cosmic States to retain its game-breaker status, they pretty much had to plow through the Horoscopes lickity-split. There might have been some tweaks and adjustments to things here and there to please different higher-ups, but I get the feeling that the overall plot is what it was always intended to be.
That's just my opinion. Until people start leaking interior plans about the show there's little way to really know for sure.