I'm sure that some people at Google are aware of the situation. But making exceptions for sites hurt by Panda might require them to add some special provisions to the algorithm, and I don't know if they would be willing to do this.
Also, I may have misled you with my speculations. I do think major revamps can have a long-term negative effect, but I should have said that it probably slowly fades away. Someone who gets in trouble as a teenager still has a chance to have a successful life. In the same way a website can eventually recover from negative events.