Certain items and blocks were removed because you can't get them in mineplex survival I've stated this so many times. I sound like a broken record. Those blocks you're talking about are illegal items so they got removed. Not taking fall damage because of you hacked in boots? Illegal item. Positions that don't let you die? Illgeal items. These gave you huge advantages. Normal players couldn't get these items without cheating them in or finding someone who would give them said items. They were removed for a very good reason. Those items were never meant to be part of our Survival Server and will never be added back.