TKD+ITA+Mar=
Smash Ace
Oh, really?
Because one character could be at a disadvantage on a level that has nothing to do with the other character. Take Skyworld for example: It's obviously not neutral, but it serves anyways. If I'm playing a tether character, there's a string chance my tether will destroy the platform instead of going to the edge. Thus, I will ban the stage for that reason. That does not eliminate a character's advtantage, like ROB's ability to camp the loop on the stage. It only stops me from gimping myself.
There's nothing wrong with the current system, and I see no reason to inundate the lists with things people are going to use their strikeouts on anyways.
Well to illustrate my term more vividly, let's think of a character match-up. Let's take Meta Knight vs. Jigglypuff. We can both agree that Falco would have the advantage in this match-up, so Ganondorf would be at a disadvantage in this match-up. So arbitrarily picking the number three, the match-up would look something like this.
Meta Knight 3; Jigglypuff -3
You would never see match-ups like these
X 3; Y 3
X 3; Y1
X -2; Y -1
X -2; Y 1
Or to illustrate in another way, imagine it as a 100m a dash. You are faster than your opponent, that would give you an advantage. Inversely, your opponent would have to be slower than you, putting him at disadvantage.
Now to apply that to stages, if your are playing a Falco vs. Ganondorf match on Final Destination, you being Falco and your opponent being Ganondorf, then you would be at advantage because you can laser camp, and your opponent would be at a disadvantage, because you are at an advantage.
As for Skyworld, you're right, you at a disadvantage, doesn't eliminate an opponent's advantage. I whole heartedly agree with you here, and I am not quite sure why someone would think otherwise.
The reason we are changing the system is reducing the random factor; the difference between a Marth vs. Falco match on Final Destination, and the same match-up on Battlefield, is tremendous. There is no reason to leave this up to chance in an area that is trying to determine who is the better Smasher. Assuming that the competitors are knowledgeable, then you will reach the most neutral stage among the 10, with possibly a slight advantage to the winner of the coin flip.