New Features for Commands/Datapacks

I have some ideas for new features for command/datapack-creators. To make it easier, I am gonna write all of them in one Post. 

1. The ability to have custom item-NBT in custom crafting recipes in data packs.

2. Some Bedrock-Commands, like /damage, /structure, /ride or /playanimation in Java Edition

3. The ability to edit more of the players NBT, like abilities, Motion, etc.

4. Possibly a feature, which allows to detect keyboard/mouse input

5. Ability to create shortcuts for long commands, like /function namespace:function = /example

6. Possibly a command to open the GUI of a block or an entity to a player (/gui block 123 123 123 Steve)

7. A command that lets you fly in survival/adventure (requires cheats and OP)

8. Bedrock-NPC in Java, including option to change Skin

9. An option to set a scoreboard value to a random number in a specific range

10. /generate command that lets you generate chunks of specific biomes at given coordinates

11. Ability to lock slots in inventorys of players/entitys/blocks

12. Ability to make minecarts and boats invisible

13. Add delay in ticks to command blocks like in bedrock edition

14. Ability to mute and unmute players in chat (/chat mute/unmute Player)

15. Custom entity models with texture-packs

Not all features have to be included in the same update, some of them may even fit in the 1.20 Update.