These are my views, and I am nothing to do with Ribbonsoft.
QCAD is not really expensive and does not really have much to debug.... a 1 month demo version would be a better idea than community.... I am sure if you were a serious developer and had contributed great amounts previously you could apply pressure.
To me, it is clearly the void between dwg and dxf that is currently the issue and bringing DXF lib upto 2007. Maybe thats worth community input?!
The legal action against OpenDWG has basically locked opendwg at year 2000 and >dwg2007 to dxf2000 conversions are getting worse and worse. Big headache to me, so much so have been know to use AD product to print to HPGL and then use hpgl-dxf convertor, but breaks blocks etc.
Makes you laugh how there are countless Win products that can access latest dwg... yet Linux got nailed.
Please be assured I am a great supporter of open source and all things Linux, but it has its place (like open source dwg access libs) and so does commercial (products like qcad).