I can think of plenty of things to add to the battle passes to make them more interesting. However for the sake of brevity and abiding by forum rules, I bring you one suggestion. Add special voice lines that can be slotted and activated in-game. This could just be added to the current structure, simply add one voice line for whatever faction with each battle pass. Players can then slot a certain amount of voice lines/war cries that can be activated in battle.
I’m not asking for anything immersion breaking. But the current voice lines are cheesy and bad as is. I would like my American soldiers to use voice lines other than “He wasn’t so hard to kill! 
”. Perhaps a filter could be added to turn them off altogether for people who prefer not to hear them.
- Yes I would like new voice lines to customize my soldiers
- I don’t care, I just don’t want to hear them.
- No I don’t want new voice lines