The problem with Season 2s (And I have seen this with alot of other shows; very popular shows (Orphan Black, House of Cards, The Americans Etc) people expect the exact same show they had in season 1 and when it changes even ever so slightly or it is not exactly as they remember it they revolt. No show can remain static forever. New characters need to be brought in, friendships need to be tested, relationships need to begin and end. It is the nature of television. I like what Jenji Kohan said about the show and that Piper is a trojan horse brought in because she is a white girl who sleeps with other girls but she who is just a window to a larger world. This show can theoretically go on years without her. The only thing is we need to be able to allow Piper and the show to grow.