On the face of it, it really doesn't seem like making changes that were contributory to the mishaps was all that much work. But it is like what I have encountered with a medical problem and the FAA. Once they get their nose under the tent they find one thing after another that must be addressed. Make the required changes, send it up the flag pole for approval and get back another unexpected list of discrepancies to attend to. They can be minimally related to the issue at hand or completely unrelated. No one noticed or cared for years. Even previously approved. But they still have the force of an FAA order.