Think of it this way, if they showed the 2.0 multiplier on tokens while others didn't have it, you still wouldn't be seeing what the party sees. as all lights would be 2x the size. (talking about wall lights, hanging torches, other peoples if "others can see" is checked on them). Or say you have a 1.0,2.0, 2.3, and 4.0 set in the party..and it showed them in GM view. whose would you be seeing it as? You cannot see all rendered at the same time. You could argue "render the highest one". But then youd have the opposite, people complaining "I got a party of 10, only one has 2.0, but it looks as if they can all see what he does to me" So it makes sense the GM gets 1.0 if you want to see how it looks different to one guy, you have to pick him.
