First thoughts after playing with a friend for about 5 hours over 2 sessions:

1. I'd like an option to hide my helmet

2. In 'story' cutscenes (not initiated dialogs), it would be nice to see 'your' character as the protagonist, even if your friend kicked off the cutscene. Example: The end of the tutorial and beginning of the next sections.

3. I'd like to see other players' die rolls.