I was wondering the same thing. I was in the away end two times and next to it a couple of times. I can't think of anything else than the netting and the poles holding the net. But that can't restrict the view of 800 people, can it?!
Looking at photos of the away section (assuming we get the H1, H2, G1, G2 area) it seems that nets and poles cover the lower half. Due to the shape of the section, that could equate to about 800. As you've sat there before, it doesn't sound as though there's anything else could account for it.