No company, especially one that brands itself as being customer-service-oriented, can afford to ignore negative social media mentions and other online complaints, particularly with an "only unhappy people speak out" mentality. It's a specious argument to say they should "ignore the whiners" and assume that every single person NOT posting about their displeasure is, in fact, a wholly satisfied and enthusiastic customer.
Now, to be fair, I don't think Disney is, has or will be doing that.
But I do absolutely think that even if they're getting a crap-ton of negative feedback via internal surveys you will never, EVER see them saying that publicly. Regardless of input, the PR spin will always be "We're seeing a lot of customer excitement" and "We think it's going great!" Nature of the beast, that.
And to everyone who keeps scoffing and saying, "Don't you think Disney is smarter than that?" when systemic flaws are revealed. Well, yeah, I don't think they INTENDED to have the level of technical glitches and customer complaints that have occurred. I have no doubt neither was in their model. But the fact is unplanned stuff happens and this roll out has anything but smooth. If it was going as fantastic as Disney would like you to think, there would be press conferences about scheduled roll out dates for this system to be implemented at all Disney's parks, not implicit statements that, as of now, they aren't expanding it anywhere else.
On paper, FastPass+ (and the accompanying My Magic whatnot) was supposed to be a panacea that increased guest satisfaction while improving technology, allowing for more targeted marketing and increased per-person-spending AND reducing staffing requirements both by automating more and better crowd prediction, but so far none of the above has come to pass. Staffing is actually increased, as is the overall customer service burden. And that's just looking at the FastPass+ part, which I agree they could likely smooth out in the future.
The real fly in the ointment, for Disney, is that the technology remains largely unreliable on the scale they need it to work on and ended up going wildly over-budget and over-time. THAT'S the real corporate crisis. Not message board squabbling over standby line waits.