(Image credit: Activision Blizzard) It's the fall of 2022, and everyone is reacting to the Call of Duty: Modern Warfare 2 open beta. Infinity Ward's reboot sequel made a lot of movement changes that seemed subtle, but angered a lot of folks. The idea was to make Call of Duty more deliberate and consistent by slowing down the action: unintended movement techniques were stifled, silenced weapons were hidden from minimap pings, and red nametags were gone. I liked it . Most people didn't have a strong opinion about it. But Call of Duty's most active players resoundingly rejected it. Infinity Ward would eventually reverse some of these changes before launch, and the next year's Modern Warfare 3 (developed by a different team) scored points by moving in the opposite direction. Speaking to PC Gamer in Los Angeles last week, Infinity Ward devs reflected on the gameplay changes that have come to define Modern Warfare 2's reputation.…