The 180 days discussion reminds me of the "don't bring back FastPass" debate. No matter what system you use, the same number of people will be successful in getting what they want. There are X number of reservations and X number of ride spots in a period of time. Shifting how they are distributed doesn't change the supply. If I am missing some aspect of this debate, please inform me, but that's how it seems. I prefer the 180 days because those of us who plan early and stay on top of things have the advantage.
I also disagree with the idea that people going on a once in a lifetime trip are at some massive disadvantage. I am projecting a bit here, but before my first trip to WDW, I researched and learned and organized and planned, and it went great. I got every reservation I wanted and I got every Fastpass I wanted. Not every trip can be that way, but if it's your once-in-a-lifetime and you choose to just wing it, then that's kind of on you. The information and resources are plentiful. It's not buried and hidden. If you do ANY kind of research on your trip, you'll quickly discover all of the info on dining, fastpasses, what to expect, etc. AITA?