Well, all stages being neutral is just dumb to begin with. Sakurai did get at least one thing right: fun stages.
Which is why I love Rainbow Cruise. It's very enjoyable to me, and I love the "gimmicks" of it. And yet, it is still balanced enough to make it a CP.
And yet, in your eyes, the best idea for this stage is just to freeze it at the ship part.
That would be more neutral, yes. But it would also be insanely boring, and I'm sure its popularity would drop.
So who peed in your Cheerios today? I'm just saying that opinions can't be wrong, but they CAN be stupid. Yours is one of those. Basically, you're saying that all stages should be equally fair. Yes, because 41 Final Destinations would be VERY entertaining.
The counterpick systems exists to make tourneys more interesting. Even the most hardcore melee and brawl enthusiasts to play on FD or Battlefield ALL the time. They pick counterpicks that have gimmicks, but are still fair enough, and mix things up because they are more enjoyable to play on.
Sure, I love pancakes, but having them EVERY day with the EXACT same plate and the EXACT same clothes and the EXACT same coffee would make me want to go strangle myself. (In no way am I saying that I'd strangle myself over brawl, that would just be lame)