As a former WOW player, to be honest, I like the "classic" WOW especially the original locations and one of them is the Orgrimmar. Its environment speaks the word FUN though it's not graphically advanced but the feeling of the word "welcome" is always present, as well as the busy streets, the mixture of beige/red/orange palettes, rich combination of materials and the dusty dawn environment.
Photo reference:
https://www.artstation.com/artwork/yrr5R
https://www.artstation.com/artwork/aRVPXk
https://twitter.com/ima_dreamwalker/status/1283875218709192711/photo/3
and some in game screenshots