Of course, this is my speculation. I listed the tech tree of this faction. Unfortunately, I couldn’t find which flamethrowers, mortars, planes, and tanks the Swiss army uses. If you have more information about these four items, feel free to add it.
does it matter?
Guns like Breda PG, Chatellerault M24/29, Fedorov 1912, Winchester 1866 are also completely out of place anyway and didnt see use during WW2 (except for Chatellerault , but not with US and Britain).
When guns to add run low, they will be added.
Some kind of permanent pve mode with basic rewards like silver and appreance orders would be nice. They could even put some limited time special rewards that fit the theme of the battle