I noticed that the Ooze Shield gives a much cleaner seam on the part than the Prime Pillar. I don't attribute this all to the Ooze Shield being a little closer to the part for the travel move. I'm speculating that wiping the nozzle in a more or less straight or slightly curved path like one gets with the Ooze Shield will wipe the nozzle better than wiping it in a tight little zig-zag pattern in a corner of the Prime Pillar which is the way S3D wipes the nozzle on the Prime Pillar.
My speculation comes from the fact that KISSlicer uses a round prime pillar and it seems to wipe the nozzle better than S3D does with its square Prime Pillar; although I offer another possible reason KISSlicer does a better job below.
I'd like to see S3D either wipe the nozzle around the perimeter of the square Prime Pillar or offer a Round Prime Pillar to wipe filament off the nozzle like KISSlicer does. Of course S3D would have to make the Round Prime Pillar more solid than KISSlicer does since KISSlicer only uses one outline in its Prime Pillar which is not enough to purge a hot end like the e3d Cyclops (unless you want to fill the whole build plate with a 1 outline Prime Pillar)
Furthermore offering user defined (as in larger) wipe distances for the Prime Pillar / Ooze shield vs the part will help give better cleaner wipes during the travel moves from the Prime Pillar / Ooze Shield to the part. For example I notice KISSlicer wipes its round Prime Pillar a default distance which is always greater than the wipe setting I choose for the nozzle.
I'm open to suggestion here.