The fences were probably a good idea. I would rather have my vision of the hairpin approach obscured a little, than run the risk of wheels flying off cars and killing me. I probably have enough photos of cars at the apex of the hairpin. So maybe the fence was a good idea since now I hardly bother getting the camera out. But, while it was probably a good idea, I spent three days being pissed off that I couldn't see as much from my seat any more, and to tell you the truth, I would rather have some kind of protection from the sun and take my chances with death.
While we are on the subject of whining about changes, I might as well mention that Fanvision will no longer be track side at Formula 1 events. Fanvision was great. You had a constant source of information to bring you up to date on whatever you needed. At a glance, you could get a reminder of the running order, see who was turning up the pace, listen in on the radio, or keep up to date with the tv coverage. In short Fanvision was a blessing. And now it is gone. I assume someone wasn't making enough money to justify creating a service to fans. While some seats will still have big screens to rely on, other stands are going to be a lot less valuable without Fanvision.
Finally, on a good note, the circuit has come up with a good idea for tickets. Now you can buy tickets to three different stands over the weekend. This is a great idea for Montreal given that it is a flat track and you can only see a small part of the track from any one stand. Now you can tour around different parts of the track for the price of one ticket. I won't be buying these tickets since a big gang of us always meets up in Stand 21 year after year, but if I was going to the track for the first time or by myself I would buy this option at the drop of the hat.