Honestly, adding Quests that can be done daily for extra coins, weekly ones for unique items, and monthly quests (that last a day, maybe) for rares would be cool. It'd be nice to have something to do besides the 4 same mini games and SITS that are done passively get a bit tiring.
Another thing that would be awesome to add that might promote more socializing in the game would be adding "Clubs", kind of like guilds where you're in a group with a group chat and have leaders/officers. Some might have POTC Clubs for people who wanna practice together, Social Clubs to just chat, Collection Clubs to share and trade items, ECT. ORRR, a gamewide, general chat where everybody can chat and players can just jump in the convo if it interests them. Even in a dead game, 3 people in seperate parts of VMK can still communicate and not feel as if they're playing alone on the game just because they're in an empty room.
Lastly, a type of marketplace where stuff can be sold through a third party system rather than having to message people through forums to meet somewhere in game, usually leading to a game of telephone in which people dont end up meeting for hours/days later. Plus it would be easier to price compare and find items that are for sale instead of sifting through dozens/hundreds of posts.
I feel like these would give players a unique experience on the daily, more ways to socialize, and a way to trade even when the game is dead. Since most of the player base are adults who works, trying to line up schedules to trade is difficult and socializing seems dependent on location when you may just want to chat while your group of friends is fishing and you are doing a quest or SITS rides. Game might feel less empty when