Man, great post, I agree with almost everything you said.

So this isn't a "official" list yet, right?
I mean, it's pretty much accurate on my opinion too, but I don't get some choices:
- Castle Siege being a counter-pick with the walk-off ledges (that are present on a good part of the battle) while Distant Planet is banned because of a walk-off ledge and a temporary Bulborb that is not that hard to evict.
- Port Town Aero Drive with the overpowered cars being a counter-pick while The Summit being banned 'cause of an occasional fish (that is not that hard to dodge). The cars can kill you easily, it's not a one-hit KO like the fish but it's not very distant of this too, and they can be a pain to be dodged with certain characters, more than the fish. Not talking about the moving parts that gimps the characters with tether recoveries. I think that Norfair and Brinstar should be counter-picks for the same reasons, the lava isn't that hard to dodge, specially on Brinstar.
- The reason for Frigate Orpheon not being neutral is the 180º flip? Because it affects the battle as much as the Support Ghost on YI in my opinion... well, maybe I haven't think too much about this too.

And yes, I'm also really sad about the ledges of FD and how they messed up Corneria and Green Greens, they were much better on Melee =\