>>150121753 (OP)
I think it's fine. But they should use real-life images. Precision matters, and having a tolerance area will only open further discussion. If the tolerance is 5cm and someone is 1cm past it, you will have people saying "but look, he's so close" as well
The process is often a bit faggy, but it's better than blatant mistakes and uncertainty. The massive condition for this is that it's a quick process. A check lasting three minutes kills the atmosphere, but the new semi-automatic technology has basically solved the issue
There's too much at stake in the sport to allow a lack of precision and certainty. I don't think it takes away any mystique of the game ... as long as it's quick and reliable. This doesn't only apply to offsides. I think there should be goal-line technology everywhere on the pitch, and it should be clear who touched the ball last. The technology exists already, but it must be expanded. Imagine a World Cup final being decided by a goal after a corner that shouldn't have been given. I'd also be in favor of net playing time (2x30 minutes) if I knew ads wouldn't be shoved in. The general concept of net playing time is much more fair than random and ever-changing added time
The sad truth is that refs have become increasingly bad after the advent of all of this technology, but the box of pandora has been opened and if we want the best results, we will have to use more technology. Refs will have more than enough opportunity fucking things up when it comes to deciding on fouls, penalties, and cards.