A form of stealth with camouflage enabled features like adding 'shrub' to your gear, adding dyes to dye leather armors to suit surrounding areas. An addition of non-setting-removable bushes/trees/rocks/barrels/crates to hide behind and peak around.
And different sounded footsteps depending on armor type, boots. mounted/unmounted, and ground being stepped on.
A variety of plants/berries/flowers you can poison arrows, food, water and blades with...
Large servers supporting 800+ people that are always up, around the world and permanent rather than small servers.