Is it possible to fix long flat face caused by braces? Class II elastics (Photo)

A couple years ago I had adult braces to improve a class 2 occlusion and moderate deep bite, but since treatment I've been very unhappy with the appearance of my face and smile. Is there any way to fix these issues? My ortho claims it's not reversible but I hate the changes. I've been trying to get used to them for a couple years now without success. Before braces, I was happy with my appearance and function but had some early wear on my teeth (I was not using a mouthguard).