Those pillars remind me a lot of the High Elf environment concepts from Warhammer Online. We built tons of big pillars, glowing gems and vines wrapped/carved all around them. There may be some ideas you could draw from them. Unfortunately, they didn't release many of those concept, but there's a few on the site…
The arches pop, but the bird is flat and the surface quality is not interesting. It needs character. Maybe play with the shaders more. Give it a grimy bronze look with wear and tear represented in the normal map and diffuse. It might also help to reduce the over all noise in the diff. Instead of scattering the grim all…