I'm not actually sure where to ask this because it doesn't seem like Fanpost/shot material, but I don't really see another forum or whatever... so:
Why don't they position cameras such that they look along both goal lines, and another two to look along both sidelines? It would seemingly solve a lot of issues of whether a ball crossed the line in the case of possible TD's, or people stepping out of bounds in the case of possible disputed WR catches and whatnot. There's always the issue of people being in front of the camera, but you have that anyways with the current system of the random camera angle from like 30 yards away. I think it would help a lot more than it would hurt (how many times have you seen a play that is inconclusive, but would be conclusive if you just had a camera watching the goal line plane?). Yeah.