We already have a GUI for setting the time, setting the weather, teleporting, and setting the worldspawn. I think the interface should include more commands.
Instead of having all the gamerules separate, they should be under one button that opens up the whole list of gamerules. The most used ones (like keepinventory, doweathercycle, etc.) would be at the tops, and the rest (except for a few, but more on that later) would be below.
Then, there should be /gamemode in GUI form easily accessible just like on the old Console Edition. This was really convenient for switching between gamemodes, so I don't see why it shouldn't be that way on the newer version. Finally, there should be a Grief Protection button which opens up the following gamerules: mobgriefing, pvp, dofiretick, and a new gamerule called allowtntplacing. This gamerule would prevent or allow players to place or ignite TNT in the world.
What do you think? Should these be added to Minecraft Bedrock Edition?