Nobody - Google everywhere is a good thing! There's plenty of data for everyone...
Regulators - Google has been given a pass too long, and it may be too late.
Verizon, AT&T, Comcast - Google has more pieces of the puzzle than they do, and fewer constraints.
Sprint, T-Mobile - If they let Google go MVNO, they let the fox in the henhouse.
Apple, Facebook, Other big content - Getting left behind at the infrastructure level.
Consumers - What exactly will Google not know about you now?
I don't care - So they're big, they're not evil so let it be.