One thing that kind of bothered me that had been complained about was the whole 'Humans meet new race and shoot at them rather than greet them' complaint. When I came across the Kettwigs after crash landing for the first time, it was them who fired upon me first and I chose the friendly hands up approach beforehand. As for bugs so far I've had a team mates gun vanish from their hands and during a cutscene the framerate dropped to 1fps
which a quick hit the Windows key and re-open ME solved that and was back to normal.