Here are some suggestions that have been going through my head waiting for the forums to come back up:
-Option to hide names and hide messages in sort form of hotkey.
-Don’t reset UI hiding on pc when catching a fish (if you use the hide UI feature a lot you will know what I mean).
-Very Rare blueprint drops from nether similar to how graffiti parts are dropped (Unique to nether, not ones from the shop)
-Crossbreedable healing pads that can be utilized for pvp and some parkours
-A perk called siphon that gives a 10% chance to regen a bit of health after eliminating an monster or player (Can be tweaked in some way)
-Offline mode with access exclusively to dynamic worlds, you cannot access your own worlds or the pwe. (Probably not worth the effort to implement, but worth mentioning).
-Craftable items, legendaries, daily bonus prizes, and other rares have a specific trashing failsafe as a 3rd confirmation because trashing and dropping have VERY similar UI
-1 in 10 change to spawn Mineshafts that contain ingredients in small chests (pixelmines)