I wondered when I heard that one had gone in. A large part of the adventure and charm of Conifer Crack was the descent, dropping down through the hole and wending your way down the gully. Unlike a lot of the gully descents there is no longer a big erosion problem, as it's mostly on rock or the steps behind D Minor.
I would also worry a that there are some detached blocks on that top pitch and don't like the idea of people abseiling down and pulling ropes over them.
That's one I wouldn't mind if it disappeared.