I like sublime palette a lot:

It makes the editor configuration easy as you can change settings without knowing their exact name.
For vim there is https://github.com/dbeecham/ctrlp-commandpalette.vim but commands are manually defined. I would like to leverage the different (g)vim menus already existing and load them in the palette.
I wonder if vim could propose an API for plugins to retrieve the menus. As there is already json utilities, I though it could go to json (or vimL dict). Sthg like:

{
    [ {"lastentry": "&File", command:"", priority: 10, children: 
         [ {entry: "Open", command: ":e", priority: 500, children: []},
           {entry: "Split Open", command: "sp", priority: 500, children: []},
         ]
   ]
}

Is that sthg that can be considered ?
cheers