Not everyone will want the bumpers, going with a case instead. As far as it goes, there is nothing wrong with the design, it just affects a larger number than they anticipated, and it got more notice. Probably would have been better if they had orientated the antennae differently on the case.
As for the lawsuit, it ticks me off when people get bent out of shape over not getting $50 for every one they spend. You bought an iPad, not a data plan. The data plan was what was offered by AT&T to help promote the iPad. When someone offers something like this for a sale price, it is not likely they are going to keep it forever. And with all the griping about how the phone companies cannot keep up with the demand for data services, are you really shocked that they could not afford to give it away? And then you get the lawyers involved. You know how a lawyer counts? "One for you, two for me. One for you, three for me. One for you, four for me." The money for them comes out of the future users of services. The company is not going to lose money, they are going to raise the price of services and cut back on upgrades. So you get an even worse deal in the future. The worse case scenario is that AT&T loses so much that they sell out. Do you think that is going to make things better? Verizon will get the iPad and iPhone, but with no real competition. So they do not have to keep prices down. And since they are on a different system, all of your iPads and iphones will no longer work. So you either are force to buy a Drone, or a new iPhone/iPad. Then maybe I will sue you for causing me to lose my service provider.