I know that booking multiple ADRs is pretty common; some people just want a plan B, and others are greedy. However, Disney plays a roll in all of this; they don't care how many ADRs you gobble up, nor do they care about the consequences that changing the morning park hours may have on PPO ADRs even if it results in many cancellations. I don't know of a solution that would make everyone happy. I do think advanced planning at 180 days out, contributes to the problem, as well as coordinating FP+ with ADRs. If Disney is going to continue to encourage planning at this level, they should make every effort on their end to avoid unnecessary changes to park schedules because it has a domino effect.