reliable sources in EK confirm that they are unlikely to get OK from the indian side to operate this aircraft on these routes immediately. if given a choice EK would have operated the high density 2 class config 773's on BOM/DEL/COK routes considering the traffic, but have not been allowed to do so (except for 2/3 months of limited "open sky period" where they operate 3 class 773's).
having said that, it would surely be good to see one of these birds coming into BOM