No matter what Dreamworks executives say, this is Effie's show.
Deena hardly ever sings in the show, and the point is actually, that Effie is more dynamic, vocally and personality wise, but that Deena is the face of a more commercial crowd.
Effie has the most compelling story, and if they shift the primary focus to Deena, then who the hell will care about AIATY, or even more, I am Changing? They'll just be there as really good songs, but they'll miss the emotional build, therefore less pay off.
Unless they keep it as is, and they just want Beyonce to be considered a lead, and not Hudson, which is absurdly rediculous.
I kind of figured this would happen with Beyonce in the picture though, which is why I had major doubts about casting.
That's the show-biz.
Personally, I think I have too much bloom.