I have always sat in the end zone, even as a student back in 1972- 1976. When they opened the gate for the students, we would run to get front row end zone seats. Maybe it is from years of watching this way, but I disagree on the perspective. I can tell pretty much exactly how far we gained on a play, but you do have to pay attention to details. Also, I like being able to see the line play from that angle, when a hole opens up I can start yelling before the running back even starts through it. On the other hand, I can see plainly when a play is going to go nowhere.
BTW, the way I can tell how far the ball is advanced, I make a mental note of what yard line the play starts on. Then I watch the play. As soon as the runner is down, I look at the line judge because he will be on the yard line where the play advanced to. So, if we start on the 40 and I see the line judge on the 44 after the play, we gained 4 yards. I mean, I can tell from watching the play that we appeared to gain 3 to 5 yards. But the line judge lets me narrow it down.
Actually my wife and I rarely drink at the games, I just really like the end zone view. Plus the indoor seating is nice for a break when it's really hot or cold outside. And checking out other games on all the big screens inside is a nice benefit. Smaller lines for food and bathrooms doesn't hurt either.