Since the whole structure is still parametric, it is very easy to control and adjust - e.g. you want to have a low polygon structure like so.  Just make the circle primitive that the SweepNURBS is extruding into an editable spline, and change the point interpolation (Intermediate Points setting) to NONE.  Also change the point interpolation settings for the Formula spline.  This is a little organic and requires some experimentation depending on the shape you're looking for, to find a smooth enough curve that is still a lower polygon count.

My Freebies