Advanced Warfare was one of the most underrated Call of Duty games ever:
- movement
- customizable killstreaks
- prestige system (15 additional prestiges added)
- armory and weapon variants
- fun and creative skins
- good, unique maps
- loopable killstreaks
- supply drops were not good, but were really good for content creation and creativity, if they were done right it could have been 10x better
Overall such a great game, it marked a massive turn in the franchise and offered a whole new Call of Duty experience.