-Name: classe/train share.
-Main idea: would allow players playing with each other to use each other's classes/trains.
-Why would this be good?: Especially useful for teams usually playing together (friends, family...), also because those have to share bonds in-game, and classes are thus significantly harder to get individually. Would also make trains easier to get for a team. More broadly, when a more experienced player plays with starters, those could simply borrow his classes for the game, and thus use them to have fun without having to farm for them. Players of same level could also use each other's classes.
-Alternative: allow players to gift classes they already have to other players (they loose the class themselves, other player gets it. Extension of the current gifting system, which allows to gift classes by buying them for the other player). Would allow new players to easily exchange classes (to avoid scam/trading, limited classes can't be gifted. Yet, the main idea is preferable, as this alternative would basically introduce a risky trade mechanic, which is not desired)
-Further details on main idea: upon creating a game in the lobby, the creating player would have the option to tick a case called "sharing." If done so, and game starts with at least another player, an interface would open before game really starts, where players have the option to select another player's class/train to use themselves.
-Variation: whether players can select or not a class that the possessing player is currently using.
-Example: Imagine I have cowboy, werewolf, and survivalist classes. My two brothers have conductor and doctor. We could start the game with them being werewolf and survivalist, and I conductor, or any other combinations.
-Contras: An issue would be players relying too much on their teammates for their classes (why buy a class if teammate already has it?) and thus neglect playing in solo. However, the boost thus given to the team would balance it (let's just play in team then!), and players could with time buy their favorite classes instead of borrowing them. Also, players could exploit this by asking experienced player's to just join them for party creation, to borrow their class, and they would afterwards leave. However, this already exists with players joining with certain classes and leaving after dropping their items to boost a solo player.