Our climber design is now illegal per the general interpretation of the updated rules. I had placed orders to McMaster, AndyMark, VEX, and BaneBots literally hours before the update. Now we have spent a good chunk of money and most of our PDV's on a design that is illegal. We've also wasted 10 days working on CAD and prototypes.
I have lived through all of aforementioned 'major' rules changes. Those changes, while frustrating for some, were designed to capture what was clearly the spirit of the inital rules and/or to prevent game-breaking designs that would ruin the event for other teams.
The big difference this time is that this rules change is arbitrary. It serves no more purpose than to make some designs illegal and others legal based on the arbitrary orientation of the robot.