Have classes or loadouts? So, just running with cliches, Snipers, Heavy Machinegunner, Submachinegunner, etc

No, would seem that specific classes are not going to be implemented, you change your class/role when you pick up another weapon. New secondary weapons, apart from the bazooka, will be introduced like the side arms, possible C4 could use that slot too.

When the engineer / resource truck will be added in the game, you can visit it to change your equipment.

Support for new outfits are coming, and it holds the possibility to make them primary weapon -specific too in the future.