To Kal's point, I think it would be worthwhile to have a thread separate from the ruleset that details the current positions on each of the stages, explaining the pro's and con's of each stage.
Generally, when people ask me why any stage is banned, I can immediately give a laundry list of reasons. I know this isn't true for all MBR members, but I don't agree with that whole "if you can't explain to them..." line. I explain it every time. People just try and find justifications for each of the individual reasons not being enough to warrant the stage being banned without viewing the stage as an aggregation of those pros/cons.
Just as an example:
Brinstar
Problematic Elements:
Lava
Changes in Lava Position
Lava by itself is not a reason to ban the stage. If the lava was at a set position of under the stage but reasonably above the blast zone, like with the water flow on Japes, it would be acceptable.
"Lava combined with an often-changing position, including positions that envelop the stage" on the other hand leads to the necessary consideration of how lava affects characters of different weights differently, how the advantage provided to characters with varied fall speeds and aerial mechanics is inconsistent, etc.
Maybe if I can get some spare time I'll create that list...
@Kish: I didn't really pull that card, I just made the statement incorrectly. I disregarded Shai nearly completely because I viewed him as being overly hostile when the same points could have been made without the aggression, not because his opinion wasn't worth listening to. My apology was for my wording, not for my meaning. The generic usage of calling someone a "nobody" got blended with my statement, despite my efforts to define it to make the distinction.
That was the best response at the time to someone who is demanding I provide them with information that would take me a significant amount of time to gather when I really don't care what they think.