Oh, I never doubted that zero-g exists in space in OT SW - it's obvious, I mean what's the alternative, that there's gravity in open space, how else to explain a spaceship traveling by with nothing underneath it - it's about how human/zero-g interaction works is what I'm questioning. Zero-g is simply a benign part of the "backdrop."
It's obviously there in space in OT SW. We focus on the garbage but look at the asteroid chase. They are all "floating" and tumbling, not just kind of still, clearly in zero-g (so Han's comment is just an extension of what we see.) The SFX explosion of the death star was filmed looking straight up so debris wouldn't fall downward as if acted on by gravity.
What I'm talking about is that we NEVER see people, or objects alongside people (ie interiors, docking bays, even people suited up and outside in space etc) where they interact with zero-g, even in suits. There are no "space walks" with people floating. It's never seen or even suggested in OT SW beyond spaceships/objects traveling in space, even where it COULD or SHOULD have been shown.
And yes, that's in three two hour movies. You would think a saga set in space would have shown it, even once. But it doesn't.
It's part of the rules of the OT, like no buttons. You don't show characters interacting with zero-g AT ALL and where it should be present - like the asteroid cave (which should either be zero-g or low gravity) - you ignore it.
As I said space, yes with an element of zero-g, is seen in OT SW but it ends at the windows, bay doors or spacecraft walls. It's never seen, or even remotely hinted at, in direct connection to people. That's where to me the Leia floating in zero-g, and stuff floating alongside her INSIDE, violate the rules set up in the OT.
And not sure what you mean about the spacetroopers - they are simply stormtroopers with an Imperial version of the rebreather Han wears in the asteroid cave clipped to their armor in the field of gravity generated by the DS (though outside.) Zero-g doesn't really come into play, and stormies wear suits no matter what.
And again - I don't want to bring the PT into this because as I mentioned, the OT is the SW gold standard that the PT and ST (and other later SW entities) have tried to recreate or graft onto, Lucas or no Lucas.
The OT is the bible, the rest are Dan Brown novels.