Did you ever get an answer to this.
What I have noticed is that if the view is a standard front / top / side then its 'High Quality'.
However if it's say a Trimetric view with Shaded edges then it comes in as 'Draft Quality.
Mark (SolidWorks 2016 sp0)
I've noticed the same, mark, and no, haven't found a solution yet. Was hoping the behavior might be different in 2016 (once i have a minute, i'll be switching over) but judging by your signature, it hasn't changed.
I was having the same issue and found the following in options.. (swks2016)
Tools -> Options -> Drawings -> Display Style -> Edge Quality for Shaded Edge Views -> High Quality
Now any time I place a Trimetric or other shaded view, the line quality defaults to "high" YAY!.
Side note... You should probably close any open files before making this change. When I first made this change, files that were already open didn't seem to pick up the new setting until they were closed and reopened....
...works good now! ¯\_(ツ)_/¯