Kazan the fact remains that that was a known BUG with a weird export format - originally the only export format it had. There were complaints about it all over the blender forums, so it wasn't exactly hard to figure out what would have caused the PCS errors. Back then blender was in its infancy - as was PCS1. May I remind you of the massive collision detection errors that PCS1 had up until after 1.3 or something? That screwed up nearly everything that went through it.
That PCS1 bug has long since been fixed, and we don't still hate PCS2 because of it now do we? If we did imagine how incredibly stupid you'd be calling all of us. The same applies in reverse. Not only was that bug fixed in the very next version, but we stopped using the DXF format years ago. Proof of this is that the DXF format does not preserve UVs or textures - yet we're producing textured models from blender.
Look, if blender models are as bad as you seem to think they must be, please by all means find the errors in the triton, lucifer, loki, zeus, aeolus, tc-tri, uglies, or the upcoming amazon drone, aten and horus. All of them have either been built from scratch or heavily modified in blender, so they must be full of problems!
Until you find such problems, stop going all jack-thompson about blender, because I think by now my stuff should have made it blatantly obvious that there are no such errors.