In a quick search of the AAJ and AJ archives, I can't see any reports from the last 20 years. I've been to Pakistan four times, but not that area, so I really don't know. My guess is that almost no one would have crossed the Sokha La in the last 10 years, and that like many such passes in the Karakoram, with smaller glaciers, it may well have become steeper, rockier and more dangerous in that time.
Sosbun Brakk and the other peaks there are very steep, so I would guess that the southern side of the La might also be quite steep. This would be a big problem with a team of porters. Once you were down off the Sokha Glacier it might be OK, because you would soon hit the main valley and the route that parties take on the trek in to Spantik.