Hi @Valery_Kondakoff, definitely some very interesting suggestions - thanks for sharing them!
Our take on a Command Prompt (similar to the Command Palette in VS Code) will be released in the next few days as part of the 1.5 update. It will start off with very basic functionality (Create, Join, Seamless View), but we will be building a lot more on top of it in future releases.
The ‘Search for an element’ popup is internally known as the ‘Universal Coupler’ (UC) since it couples elements to the card. That’s a great idea to assign a keybinding so the popover won’t close automatically once you add a new element. We will have a look into seeing how we can improve the UC so you can bulk-add elements without it closing each time, along with your other suggestions! 