It’s good that anyone can change the map, but it can be annoying when you’re playing with friends and someone keeps switching it. You also don’t know who is changing it. I think there should be a log showing which player changed the map, so if someone keeps switching it, the party leader can identify and kick them.
Also, I think the “End Game” option should only be available to the party leader. Sometimes a player can troll others and end the game, which ruins it for everyone else.