Fringe, Over There, II

I'm writing my own analysis of Fringe, although there are many who do it better (naddycat), I thought I would post some of my own thoughts and theories.

When our team crosses over, they find a world that answers many questions and brings up many more.
Bell reveals that all communications are monitored, musing that that must be the explanation for the Central Park ambush. The question that arises, then, is about Nina's messages to Walter. If they are being intercepted, that explains why he doesn't answer. But how is he not under suspicion for receiving messages from the other universe? On the other hand, Bell made the shape shifters. Perhaps he hides Nina's messages with the messages from the shapeshifters. Which begs the question of why he doesn't answer Nina.

We learn that they use quarantine amber to contain wormholes that cannot be stabilized. Bus scene from The Ghost Network, anyone? It's clear that the ZFT terrorists were using Walter's hit book ZFT, which is published on the Other Side. The ZFT book is connected with David Robert Jones, who called Olivia a soldier and tried to recruit her for the war. So ZFT was likely written after the Cortexiphan trials. Which brings up two questions: did they invent and use Cortexiphan on the Other Side? And was the war coming prior to Peter's kidnapping? If not, then why were Bell and Walter preparing the kids with Cortexiphan?

We see that Walternate is very cold and professional, even with Peter. There is no emotional embrace, no softness. Is this Walter's personality, or is it because Walternate is planning to use Peter and therefore doesn't allow himself to get close to him?
Walternate tells Fauxlivia that the people from our side are "monsters" under their skins. This ties in nicely with what Bell and Walter used to be: monsters who experimented on children and adults without informed consent. Indeed, while Walter regrets his actions, Bell is unrepentant and proud of their work on the Cortexiphan kids. Is Walternate as ruthless as Bell? Or Nina Sharp?

A few minor points. After the first half of The Other Side, I predicted that Fauxlivia dyes her hair. I don't believe Olivia would waste time dying her hair blonde constantly. I'm taking Olivia's quick location of the correct shade of hair dye as confirmation that I was right!
Originally, the return plan was for Olivia to open a crack, which obviously wouldn't have been possible once Fauxlivia switched places with her. But when they started their machine, Bell said a crack was opening. So the machine opened the crack, not Fauxlivia. Is that a continuity mistake?