Good quality conversion for CADCAM requires tangental arcs, or as close to tangental as possible within a specified tolerance value.

I would rather wait for a better quality conversion myself, and there are commercial products selling for hundreds of dollars (even more than the selling price of Moi!) that do a good job.

Since you mentioned CNC cutting apps, its my opinion that if you want to support DXF for that purpose, you have to include tangental arcs in the output.

Chris