Side and corners of an archway
I've made the following decisions:


Around the sides of the corner, I removed an extra inch of wallboard so that I can now affix a more sturdy 2" section.
For the face of the archway (the section that walk through), I have purchased 1/4" drywall which opens the space as I need.  Around this 1/4" section, I will use two plastic corner beads, one on each corner.
My joint will indeed be at eyelevel as I don't want to mess with the actual curve of my archway.  I am quite proficient at making joints disappear so I have no worries for that.


Thanks again for your input.