Skydefault - as greybeans ranks are listed as "default" in /list.

 

Adding Shulkers, Sea Lanterns, /warp mob, /warp hostile and mob arena to /economy

(I do realize that the devs have alot to do and this may not be feasible)

 

you can trust yourself on people islands

 

You get banned when you die

 

/spawner wither and /spawner enderdragon for skyknight+