Suggestion to change Unity hotkeys and actions for better experience.

Have no idea where to post this, so I`ll try to do it here :)

First problem: annoying big menu bar for every Super key press.
I`ve a habit to use Super+D to collapse all windows. So I need to redefine Unity to Control+Super if I don`t want always see this bar.
In classic gnome & kde there is a special button, something like this might be good for UI, doesn`t it?
In my opinion it might be better to do like this: Ctrl+Super to show Unity bar + big search menu, Super+D for fast collapse, and Super just to show unity bar without opening the big search menu (it faster than dragging your cursor to the top left corner of the screen and then moving down to the program you need to open).
Second problem: second click on program icon on unity bar doesn`t collapse it. It`s do nothing actually. Suggestion - if there is one window of the separate program, and it`s active, one click on the icon should collapse it, one more - expand. For two or more windows - double click, I suppose.
And why Super+Tab combination doesn`t working by the way?
At last, when icons moving on the unity bar will enable?

Thank you for your patience, I hope my English is readable :)