Please consider loading mods up after selecting what map you’re playing on. (single player, co op, or on a server, etc)
Selecting the map option (again, single player, co op, or servers, etc) will give a list of mods used on that server, with the option to double check your mods against what is being used there.
Include the options to select the mod(s) you want to activate/deactivate and/or download/update at that time, as well.
Also please make it so the game doesn’t have to be restarted every time mods are shifted around.