I don't agree with your statement at all. I don't think I'm 'disadvantaged' by FP - I would rock it like the best of them. I just don't look at the theme park as just solely through my eyes, but how the whole system works together. Do not look at someone being critical or praising something as only being about their personal take. Identify if someone is being truly objective or not. I know that just because I may gain from something, it doesn't mean everyone does, and if I'm discussing the park as a whole and not just MY vacation... I will consider how it impacts everyone, not just me as an individualist.
I love the idea of diffusing demand to reduce average waits. It's the math answer to a simple system problem. It would work great if it were used that way, instead Disney chose to make it a lead use, and ran the ratios so high that instead of being a minor impact on lines, it buried them. Then when Disney made it a scheduled thing instead of a demand-based thing, they changed entirely to a reservation model instead a demand-shift model that FP was originally based on.
I do believe Disney has changed the park experience for the worse with the sum of their changes to how people plan, visit, and experience their day by making too much of it tied to schedules and worse... requiring fighting for availability. Vacations should be about relaxing, exploring, and being amazed. The current world of scheduling where you will be, when you will do something, when you will eat, where you will stand.. and having to do all these things far in advance... and SUFFER if you do them poorly or can't stick to it... is not what the lead vacation experience should be IMO.