Is the angle adjustable in and out? Was gonna say maybe it looked like it could be out a bit more in the pics, though I have no experience with wing blades. Seeing the video looks like you have it close to the sweet spot, snow rolling off nicely
Where you have the chain you could make a rigid forked link, with adjustment holes, that would give a little more height adjustment options, (able to keep
ballast box higher and blade lower) and prevent any float up and down with the chains slack (may or may not be desirable, again no experience)
You mentioned the desire to be able to adjust height at the front. 2" receiver tube would be ideal, slide the 2" OD inside the 2" ID and have pinnable adjustment holes. could also use that concept to adjust outward angle.
Seeing the video and the way you were plowing and winging at the same time would be great for real long drives or access roads.
The way I would envision using it on my shorter runs would be plow first with out the wing then come back with wing and plow up or even no plow and do some dedicated wing blading.
Just some thoughts