Good question. I actually am lucky enough to have both an Ebony and the Arca. I noticed recently that even though I got the Ebony for just this reason, I always gravitate toward the Arca Swiss. Maybe I am more familiar with it, maybe it's because the movements are more extensive, I don't know. I realized that virtually all of my best 4x5 images, the ones where the camera was really second nature and at its best as a tool, are from the monorail.
So I thought I would think more seriously about how top pack it more efficiently, and maybe even sell the field camera once I figure it out.