Miniguns, in most servers, tend to be overpowered. Players can fire walls of bullets that deal tons of damage, free of any movement penalties. Would it be possible for someone to create a minigun that can't be fired normally unless you toggle on the barrel with right-click? When the barrel is spinning, you can fire the gun, but your movement speed is drastically decreased and you can't crouch or jump. By right-clicking when the barrel is on, you turn it off and can move around freely.
I feel like this is one important change to the way guns operate in this game to make DMs more fair and fun.
Also, if at all possible, make it so that if the weapon is dropped, the player automatically switches back to the server's default player and isn't stuck on the slow moving player.