What are you suggesting? - Add a no kill zone to the mining area.
How would this change better the server? - Make it so you can afk mine without being ardm/rdm'd.
Are there any disadvantages of making this change to the server? If so, explain. - Not that I can see, Just make it so the hallway isnt included in spawn protection otherwise D-Class will snipe from there and abuse it
Who would this change mostly benefit? - Miners