Portal is your friend.
If BF6 Portal is anything like the 2042 Portal, you'll be able to unlock weapons, gadgets and throwables.
This is such a fundamental issue that Portal won't be a solution. All classes need smoke grenades. All you're doing is forcing people to:
A. Exclusively play as Support
B. Die whenever you don't play support, because you can't push safely.
C. Play with your squad mates and have one of them play as support.
There's just one glaring and gamebreaking problem: Option C. won't always happen no matter how much you try to force it.
