fully 3d view
now i dont know if this is already in the making, but with a 3d preview already existing why not a real 3d object.
so when looking at the 3d object you could move the object around its axis to see if everything looks good. (the host can do this)
I think this is doable for windows or mac but i dont know if the pi can handle this.
just a idea
Comments
At the very least this should be an option in settings... you don't even need to write it yourself, you could use gCodeViewer (demo), which is under the Creative Commons Attribution 4.0 License