All of these posts sound very familiar. I too was down to a very decent handicap (2.4 index), then one day while attempting somewhat of trick shot out of the rough from under a tree, I shanked one and nearly killed my playing partner. My next shot attempt, a 52 degree wedge, was also a hosel rocket. I've seen my playing partners shank one and be able to shake it off and return to their game, but me, no such luck. The day after that event, I began to shank everything from 90 yards and in, mostly with my 52, 56 & 60 degree wedges. This has happened on and off for almost two months now. My index has slowly risen to almost 4.0, but that's mainly because I'm afraid to play golf anymore. While practicing on the range, from time to time I hit it great, then I get enough confidence to hit the course, then wham, back to shanking. Then while attempting almost every shank tip fix known to man, I begin to shank every club.
Most recently I've found success utilizing the training tool Inside Approach, because even when I was playing well, I had a little over the top move. While it appears that the Inside Approach helps me avoid the shank with most every iron, it seemingly has no benefit when using these wedges. I will attempt to concentrate on keeping my eye on the ball and moving the shoulders. Thanks for any additional tips targeted toward the short-shot-shank.

snpperhd