I was having the same audio delay issues with speech, take-off/landing sounds, etc when I was playing the game installed on an HDD storage array. I moved the install to the SSD system drive and that’s all gone away. Crashes have gone down too, I was crashing 2-3 times in an evening of playing but for the past several days or more I might see one crash in a 4+ hour session. Still more crashing than it should but it’s not absolutely terrible