They can draw all the lines they want, but if they are not drawn at the PRECISE moment the ball is kicked it is pointless. When you are talking millimeters, as in Coventrys case, if they are a nanosecond out on ball strike it would make all the difference. I have watched footage of that "goal" from the opposite side of the stadium from the cameras, and have to say it was 100% onside.
The side drawn at home should always have the advantage . if a tie goes to a replay, and then drawn again, the side drawn away currently get an additional 30 mins and then pens at their stadium giving them an obvious advantage to go through, so yes, I think the change is correct.
This is all well and good, but what if he has had a look, and decided that none are Championship standard, and maybe never will be? Just a thought. Maybe Scott, Semenyo, Conway and Bell were the last of that generation.