Originally Posted by IntrepidAfrican2

the reason not to do this is cannibalisation: if you have hard products that are too similar (in your mind sample, to the lesser EK J product), passengers will often default to the cheaper option. You have to maintain sufficient differentiation to ensure you don’t lost higher paying customer to cheaper seats. The aim of PE should be to get economy passengers to spend more, not tempt business passengers to spend less.

I’d also wonder why EK would be expected to do this when no other airlines that I know of are doing it? What you describe seems to be just a concept at present.