I don't really get why everyone says no to this, campers are extremely frustrating and have ruined this gamemode completely for me. The only reason I don't play eggwars anymore is because every game ends up being an hour long because there's always that one kid that camps the whole game..
There is even a rule against camping, it's not allowed to camp.. Then why not add something in against the campers? So that camping doesn't give you a massive advantage anymore. I personally think that adding enderpearls or an elytra would be a great solution. They could change the enderpearls to 48 diamonds instead of 32 like you said, so people don't complain that it's overpowered in an overpowered gamemode...