If ED is not going to fix the replay bug and it's not "meant" to be an exact replay of your mission, then they need to rename the feature to something else. I just saw this post and didn't know that "Replay" meant that it's only a record of my inputs. That does explain a lot though. I absolutely love DCS and have many hours in it. They need to rename the feature to "input replay"... Or something similar. This 'bug' is frustrating when you think you can see your missions after you fly them only to discover that's not the case.
