I apologize if any of this has been posted before, I couldn't find this myself using the search tool (especially considering that most threads are in German only).
Suggestion 1: DLC Compatibility in multiplayer
I'm going to take an example of game Cities In Motion 2. In that game, in multiplayer sessions all DLCs were always enabled for all players. That means all players could see DLC content, even if they didn't have it but they couldn't use/buy them themselves.
Would it be possible to implement similar logic to LOTUS also that DLCs are always enabled for all multiplayer sessions and all players can see them (and of course the custom repaints the server has set for the said vehicles) but the people who don't own the DLCs can't spawn or switch to those DLC vehicles or not spawn to DLC maps etc?
Cities In Motion 2 was in Steam also so technically something like this should be possible that all players actually have the DLC content in their game at all times, they just can't use it themselves unless they've bought it. And from what I've understood Rail and Street modules are planned to work similarly (you can see the content but if you don't have it you can't use it yourself)
Suggestion 2: Allow joining later on
Idea is simple, allow players to join server/session after the game has started also. For example you notice your friends are playing later than they started and you would like to join them also. Right now you can't unless they start a new session (from what I've understood)