I mean, talking about the external sounds yeah, you’re probably right. That’s a highly subjective topic. I think the ground idle sounds completely wrong, as it currently growls like an engine on military power but I never spend time in the external view anyways :D
About the cockpit sounds, apart from hearing Jester click stuff all the time (that kind of breaks the immersion a little bit, but someone is gonna mod this anyways), I really like them, even though they are not reeeeeally 100% realistic, but that would be kinda boring as well so I understand HBs motivation behind this.