Well, speaking for myself, it is absolutely the overplanning that sucks all the fun out, and I feel their Fastpass+ system sucks. I would gladly pay more money to have a bit lower crowds and not have to plan everything (which I don't anyways - but if I wanted to get all the good rides I would have to). This is why I will pay for an After Hours party and really just skip doing any days at all at WDW.
Disneyland is different and hasn't been totally ruined yet. Hopefully it never follows in WDW footsteps.