Hello,
this may be a bit of an obscure feature. I read the DXF/DWG thread and these format are for more important and they're not implemented yet so I'm not sure if this would even been considered. However, I use Designer to create drawing to import into my lectures and I use LaTeX to write them. One thing that could be really interesting is exporting our design into a code written in PGF/TikZ to import into a .tex file. (https://en.wikipedia.org/wiki/PGF/TikZ). There are tools that convert SVG to that already : https://github.com/kjellmf/svg2tikz. PSTricks export could be nice too: https://en.wikipedia.org/wiki/PSTricks .
Well, I don't think a lot of users knows these « format » but that's worth a shot