> All the oposite from today's design in which they let people rename everything.

What spreadsheet program lets you rename a row or a column? The pattern I see all around is that you add your own column names as the first row for example, but the actual column doesn't get renamed. Or, you get to define your own "Named Ranges" where you can assign a name, but the row/column identifier stays the same.

But I don't think I've seen any software allowing you to rename column C to whatever you want, for example.