I don't think Nightfalls have ever showed anything (Destiny)

by stabbim , Des Moines, IA, USA, Saturday, September 12, 2015, 01:23 (3457 days ago) @ ZackDark

The box for selecting difficulty is missing, yes. But the text "very hard" is there in the tooltip, in red.

Of course, without knowing when this picture is from, and the stats of the character that was in use, this doesn't prove whether nightfall ALWAYS showed up as very hard (I honestly don't remember, though it probably did). But there is definitely a place for it to show up.