Somtimes you just want to give the User a little Side Calc without a full blown Sheet, just the grid with some cells able to change.

Set Fixed Cols/Rows etc. or setOptions( {filter: { ref: "A3:G49", columns:[]}});

Set default Cell Types like Date(Time)Picker, Checkbox, 
SimpleCombo, Autocomplete or own Custom Editor (see other Feedback suggestion)

Define by Settings or via API Calls custom context Menu for any Cell,
like change current by Event BeforeContextMenu(ref ContextMenuElement)