Maybe a bit of both. Regardless, I liked it!

1) I’d thought about Peter being here once they talked about the universal balance. We just don’t have enough information to know if there was an equal trade. I think that might be part of what the Observer keeps telling Walter about it being time. Maybe they’ve agreed on a temporary situation where by the balance is delayed. Personally I don’t think all the things they investigate have 100% link to the other side. Some things do, some don’t. Most have been the results of Walter’s previous experiments and for a mad scientist gone insane that’s a trove of plot lines in waiting. When Charlie appeared in the shuffled episode, I’d really thought it was the other universe. I mean, we did see a glimpse of it with Boston burning. You have to assume that since there was a matching architecture firm, matching Harvard, matching people, that there’d be a mirror Fringe, only there it’d be called Brink Division or something. ;)

2. Possible. I was unclear whether or not her power to turn off the lights was ever real or all part of Robert David Jones’ big game against Olivia, but this was definitely real. Whether or not she goes all Jean Grey on us is yet to be seen. Keep in mind, there’s likely another Olivia on the other side with the same powers.

3. They are, but the glyphs between the commercials have glowing lights by them that tell you which letter they are; most would then have four letters for each symbol. (I say most because there are couple that don’t.) But these were just a couple of them. I saw a buttefly, flower, frog, and seahorse. I didn’t see a leaf or a horn or apple or smoke face. In fact, I don’t see the horn in any commercial breaks but to me it’s the most interesting symbol. (It has the numbers of the Fibonacci sequence etched on it.) This was likely just the set designers asking if they could make the fans squirm by throwing the symbols onto the building. But it makes sense that the decorations used there are found throughout massive dynamic (leaf on the hand scanner.)

1. Does it follow that when our Walter snatched their young Peter, bringing him into our universe, that at some point thereafter some other poor child of similar mass from our side got sucked to Over There? How about when the shapeshifters come over? How much of the bizarre stuff that Fringe Division investigate is really just normal ‘otherside’ stuff that got sucked over to our side? This is reminding me of the Torchwood rift. Is there a counterpart Fringe Division on the other side that investigates bizarre creatures that would appear totally normal to us, in our universe?

2. Can Olivia now start fires with her mind again, since she seems to have re-accessed her locked-away abilities?

3. During Olivia and Peter’s conversation on the school playground (when Walter comes out and suggests that she change into comfortable clothes) you can see a few brightly-colored decorations on the exterior wall of the school. They’re in the background, over Walter’s shoulder. Those decorations include pictures of a seahorse, a flower, a leaf, and a hand (those are the ones I recall). Aren’t those all glyphs? Just cool easter egg set dressing, or do they spell something in code, perhaps, as the interstitial glyphs do when the show goes to commercial?

However, you’re right; that trend isn’t good either. It may have a similar effect to the supposed effect of video games on children (fits and violent behavior/attitudes).