Hello!
This post will mention things me and my friends thought about improving while we were playing:
1) Everyone has to "mark" the same crates/oil drums etc. There should be a range cap for example 200 meters but still making everyone checking the same things while you and your teammates are standing next to it is just annoying.
2) Bugs with driver or passenger is "flying"/"running" around the vehicle.
3) Bug with helicopter rotors not spinning while flying.
4) When final mission was shown on map the text about vengeance served called kept repeating over and over and over making as mad.
I think that is all. Overall our experience was good one and a lot of fun. Definitely to play in group