I gave the J-Park a go on Wednesday night (9/22). Just a quick conditions update for ya...
Went straight up the middle to 9200 feet. The bridges were sphincter tightening, but the snow was steep and solid.
The first Bergschrund can be passed on the climbers left through a patch of snow that shows some signs of rock fall. We didn't do this, instead going directly through the first berschrund zone. This is around 8800 ft if I remember correctly.
The second bergschrund is where we met our match. It is possible that another team, with a different skill set can still make it up and through. There's a wall of solid glacier ice, with a snow cornice overhanging the top. It looked like you might be able to traverse it all the way left to negotiate around the cornice. I gave it a try, but no luck.
I don't know if it goes, but it might be possible to get onto the rock ridge on climbers right and traverse above this upper problem. There is a pretty big moat/ice/rock chute on this side but there could be a bridge across.
It was a solid hike, fun times, but no summit. So it goes...