when on earth to you need to put the cursor back a word without deleting it when using farr?
I don't usually use it, but i do use it when using fcalc, (when you have a number lika 12340943756, you just press 1 key to go back to its begining).
I also use it when searching for directories. If type the wrong first letter, i press ctrl-left to go back to its begining, and right now that has bad results.
I think you could leave alt+left/right doing what they do right now, since that makes some sense given the fact that alt+left/right go back and forward in history in windows explorer. But ctrl+left/right really should act as they do in most editboxes.