I think they should allow things like solo stealth gameplay. Why wouldn't you want multiple ways to play your game? You can do the payday 2 route where there is loud and quiet ways to complete your mission.
There are a lot of strategems that feel too underwhelming, some buffs would help. I feel like the autocannon should have a bit more armor pen, I don't care if it reduced damage but that would make it infinitely more useful. I saw a guy running arc and it was doing pretty well, I only tried it once and killed a teammate so I guess I'll try again. Some of the airstrikes could be improved probably.