Couple of additional controls would be amazing:
Architectural Sketch Lines - Extend lines past the connection to make the architectural "x" look, control the length
Line Jitter - makes the lines look more sketch
Watercolor feature - like a filter to be more water color / hand render style
Fade render - as the render comes closer to the camera it moves into a sketch/ white mode version (this could be done in photo editing after but could be a cool feature to add.)
Ghost Entourage - make transparent or silhouettes - these could be assets, but controlling the people transparency through this dialog could save it to the render settings.
Sketchy Entourage - sketch version of people / silhouettes / super low poly people - good for early versions of renders and models to give a sense of scale