Turn off isoline display. I wrote a little script that replaces export/export selected. It just turns off isoline and then exports. simple but a life saver.
Good call, that explains why models are jacked up with Isoline on :\ I only use TS during modeling (performance). I use Meshsmooth before exporting (classic output) and adjust relax function to tighten the model to high rez. You got a link to your script?