There are two "vents" there now.

One is low and horizontal, and the other a near-vertical fissure crack.

The latter looks closest to being able to be passed, but man, its TIGHT and the flow is like a firehose in your face. CAREFUL if you go down to the vents - be on your game, or you'll get jetted up and/or have your mask blown off your face!

Its DEFINITELY more open than it was a couple of years ago. What's beyond that initial restriction though I don't know. I bet some comealongs, stakes, lines and such could be utilized to try to clear some of the debris, but you'd literally be playing with your life. If you precipitated a collapse of some of the formations in there you could easily have something come down on you - that would be the end of that.