The 'midpoint' script code is easily recast so that the new guide-point is not placed half way.
What proportion would you want it to be for a 'golden-section' - probably gs=point1.distance(point2)/1.6180339887 will be more than accurate enough for the offset of the picked point1 towards point2... thus pointc=point1.offset(point1.vector_to(point2), gs); then use entities.add_cpoint(pointc)

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Is there a bug report that addresses this? It's still a problem. Just try using the component for this item:

Samsung 55" LED LCD 240Hz TV (UN55B8000)

That " inch mark trips up the DC code. The temporary fix is to bring up that entity's info and remove the " character. That'll let the DC code continue.