Special blocks/items: So there's blocks and items that we cant get without using world edit or commands, so I suggest a menu that allows us to get these. The command could be /market, in this market there would be Invisible item Frames, Spawners, Barrier Blocks, the Dragon Egg and possibly some more. This is too give us these things fast and easy.
/lay and /crawl: /lay is already a command and I think everyone should have access to it when in creative, there's no real reason other then its there so why not. /crawl is a bit different, the crawling affect is for when in a 1 block tall area, I don't know if it would be possible in-game but if so it would be cool.
/p set gravity true/false: This command would only effect blocks that already have gravity (sand, gravel, etc). "true" would let the block fall like usual while "false" would remove the gravity from the blocks, this could be useful for builds that are suspended in the air without needing string.
/p set mobs true/false: This command would enable or disable mobs, there could be a cap of 2-3 mobs per plot if needed. "true" would let spawn eggs work and spawn mobs, spawners would not work with this, and "false" would despawn all current mobs and not let spawn eggs work.
A small problem fix: Currently from what I've seen players that are not staff can not use bedrock in world edit, it was something I figured out when using it for build outlines. Personally I think this should be something we can all do but if there's a reason we cant then I'd like to hear it.