In reply to DizzyVizion:
Did you manage to get on it? Your logbook doesn't show an entry. Sadly, you may have missed the window, as the face is now basically snow free.
The difficulty is very conditions dependent. A small coating of snow, a brief melt, and then a good freeze is ideal as it fills the cracks with usable ice. A covering of soft powder snow is far from ideal, as you can only get purchase on rock holds but they are all buried and hidden.
I find the crux to be lower down, in one of the early steep sections, but maybe it's because it's near the beggining and I'm still getting mentally dialled in. The "official crux" is good fun and not as exposed as other places.
There are alternative ways down if the Coire is an avalanche risk. You can head further south before turning west, or even come directly down the front of the mountain, but I wouldn't recommend that unless snow cover there is light.
As for D Gully Buttress, made the same error myself on a clagged in day! The rock character is quite different, downward sloping holds instead of the jugs you get on curved ridge.