I would personally like to see a feature where you, as the Host of a VS Server, can add Mods onto the Server.
As i personally see my PC getting to its limits with already like 4 Players on, its still managable.
But you do experience tiny lags here and there on the Server.
So to have an alternative where you could add Mods on and not experience your PC burning because you are running the game + the Server would be pretty nice.
My PC Specs if you are interested:
CPU: Ryzen 7 3700x
GPU: GTX 1080
RAM: 16GB DDR4