I didn't mean to be disingenuous on my comment. I was trying to point out that suggesting more fine grained subjective rules conflicts with saying everything is anarchic because it may be subjective.
It's obvious that sports evolve. I think my overall feeling about this is that soccer IS evolving. Just not in that particular direction you and many others seem to want (i.e., more clear less-subjective rules, cameras, etc...).
As far as multiple referees goes, it's simply a matter of having greater field coverage in the area of view. It also reduces referee fatigue. It's a no-brainer and is the norm for just about every other sport on Earth.
Let me ask: what was the call in the US / Slovenia game? Nobody knows except for one guy. I was stumped. The commentators were stumped. The players didn't even know. There was no signal whatsoever, and it's not even required.
In fact, you actually can signal just about everything: pushing, holding, dangerous challenge, tripping, elbowing, and unsportsmanlike. Pretty much everything can be summed up as one of these with a simple hand signal.
Your point about the difference between "discretionary power" and "anarchy" is disingenuous. One would expect an officiating body for the world championship for a sport to have at least a reasonable consensus on what constitutes fouls and caution-worthy offenses. Do you think that the German team deserved 5 or 6 yellows and a red from that Spanish ref? I don't think so, and most people did not.
Sports evolve. You can either embrace it or fear it.