No, we've never done a WWME weekend. My parents used to recommend it from time to time, as they used to TEACH/FACILITATE them, but we've never done one. I honestly don't know anyone for whom they've worked more than short-term (I seem to recall that you came back all fired up, but since then, things have fallen back into the status quo?), and our lives are SO full with the activities of the four kids and both of our jobs, I'd hate to take all that time away.
You may be right about the short term benefit. I know things are not all wine and roses since we went to Retrouvaille. On the other hand, what is so bad about a short term benefit? Do you take a vacation with the expectation that you will never have work-related stress again? Of course not. You take a vacation to kick back, relax, and recharge so you are better able to handle the stress of work when you return. The short term upswing in the M may be what is needed to work through the down times. My W and I still have moments where we want to throw in the towel, but we are still here fighting the good fight.
Look at WWME or Retrouvaille as a good day in the stock market during a bear market. The stock of our M has been steadily declining for years. It is lower than it was 5 years ago. Without that big upswing in the middle, the assets would be gone and we would be bankrupt. In fact, it may be time again for some kind of short term benefit to pump up the share price.
Gone the carvings and those who left their mark. Gone the kings and queens, now only the rats hold sway.