How difficult is postscript? at present i'm a tourist in the US and have a lot of time on my hands..... if its something a designer can learn it might work... as in, is it as simple as LaTeX?
I'd say it's simpler than LaTeX overall - much less primitives and the primitives are more limited. You can certainly try. Get a good book on Postscript (I have one but it's old, so I won't recommend it), fire up Ghostscript and see how it renders simple examples. It's also very useful to study the PS output of various programs and see the tricks they use.
But in general, I don't think PS output is worth so much effort. PS was initially designed as output format, not intended to be editable. If you look into PS output of e.g. dvips you'll see that it breaks the text on each kern as well as on each font change, which would also make such PS barely editable. Same for most other programs. As you know even PDF (based on PS) is not freely editable in Adobe's own tools; you can as much as fix a typo but not e.g. reflow a paragraph. Postscript is just a too low level format for that.
Now you might ask, what about Illustrator. The AI format is indeed based on PS (in recent versions, PDF), and this is in my opinion the worst design decision Adobe ever made. The too low-level nature of PS forced them to invent an ungodly amount of hacks to reliably save all information that is needed for a vector drawing, and as a result, the format is very different across Illustrator versions and very convoluted. I won't be surprised if a future version of Illustrator switches format once again to something SVG-based. Looking at the examples of SVG exported from Illustrator, I see that they put a huge number of extensions there to hold all their AI-specific stuff, which may be an indication that they're preparing a complete move to this format in the future.
So, my honest opinion is that we don't need to spend resources trying to chase AI, but instead concentrate on a good SVG support, because this is where things are going. AI format is an evolutionary dead end, and PS/PDF are going to be limited to output niche only. So I think we are OK so long as our Postscript output is valid and matches the SVG, but trying to attach more semantics to it is not worth the trouble.
Just an IMHO, of course, feel free to disagree :)