my big concern is that when using sketchup and having a square shape with a round cutout. Sketchup has poor mesh handling so when I use displacement there is that strong possibility of geometric artifacts (i.e. elongated displacement geometry where if based off of a grid the artifacts would be less likely to distort geometry) I'll try and render up a example later today.
As far as the grid I was just looking at the "grid" to be triangulated, within sketchup the square is divided when exported into two triangles. so essentially it still maintains the triangulation as opposed to quad faces. Please forgive me if I've got something wrong, again I'm in no way knowledgeable in how the software actually functions.
oh and why artisan? its because out of all the plugins out there it has the most promise of what I was hoping for and It has a ton of other awesome features that I'll be buying it for 
