@ATH Make2D has been under par since it was introduced in Rhino v2 (?).
It was in my opinion never a really serious tool, but a way to stop us from going nuts for not having a proper 3D->2D tool. It IS better than what it was, but everybody would expect that after 10 years. It still does strange things, like hiding parts of outlines, so I hope they fix that, as that to me is more important than shaving off some time. If it had a status report then we would now how far it had come and guess on how long it would take to compete, and that would save a LOT of frustration, as not knowing, and wondering if it has crashed is the worst there is when on a deadline.
Luckily they are working on a new solution for V6.
Always calculate with Hidden lines and move the wrongly calculated ones to the right layer, then delete the rest. And group the output. And keep on nagging, as make2D is probably the biggest reason to not use Rhino fulltime if you are an architect. (And remember that many architects are used to AutoCad, so they are not so spoiled, yet)