There are a lot of assumptions in this post that I want to address. There seems to be a popular myth which claims that posters on DISboards or other Disney/theme park fan sites are atypical of most tourists. I would say that we are typical of loyal, repeat visitors. I would also venture to say that repeat business is very important to the theme park industry.
Elsewhere on this thread, people have said that 50% of guests used Legacy FPs. So among the half who were clueless about the old FP system, there are a certain percentage who had a bad experience because they were stuck in long lines for most of their trip. Disney probably lost them forever. Another percentage could only afford to come to WDW once in their life, as a long-saved for dream destination. Still others only come back every 5-10 years, or even less.
So my guess is that, among the 50% who did use Legacy FP, most are frequent, return customers who spend most of their vacation dollars on theme park trips. That is a core customer base who make up a disproportionate number of Disney visits. This is a group that often, through their enthusiasm, "converts" others to the cult of Disney, bringing their kids, relatives, friends and significant others to the resorts. When we love what the company is doing, we spread the word through social media, sites like DISboards, and old fashioned word of mouth.
The company would have to be nuts to be unconcerned about keeping us happy.