Re: Organic material?
"Doesn’t say how complex, though."
Because they don't know. The instrument taking these data is basically just a mass spectrometer - it can measure how heavy a molecule that hits it is, and that's it. They can see that there's a bunch of stuff with atomic mass 28u, which can mean N2, CO or C2H4. And from other data they can infer that at least some of that is C2H4 released from the breakup of bits of the dust and other crap generally floating around the place. But the data here can't say anything about what it was all actually made of before that point.
"All the speculation about how the first organic molecules were created on Earth and there are loads just floating about in space?"
Yep, this has been known for a while. Organic compounds, even fairly complex ones, turn out to exist all over the place. The fact that they're relatively common in Saturn's rings is apparently unexpected, but finding them floating around in space isn't really new at all. What this means for the development of early Earth and life is still very much up for debate. On the one hand, it seems organic compounds are all over the place and things like comet impacts could have brought significant amounts to Earth. But on the other hand, there's plenty of carbon, hydrogen and oxygen on Earth anyway so there's no problem forming them right here. It's entirely possible that organic stuff rained from the sky all over early Earth, but was irrelevant to the formation of life because we already had plenty of out own anyway.