1) This advice is sound. Why go somewhere on vacation that you are no longer happy or excited about?
2) In the grand scheme of WDW revenue it doesn't matter, however it matters a great deal to YOU. If you feel that WDW is essentially becoming a rip-off, not throwing money at it is probably the best course of action, for your own sanity if nothing else.
3) Disney does care more than a lot of companies, but in any business you can't chase
every customer. There is no way to make everyone happy, all the time. Once, in college, I met a stranger on a train while traveling with a friend who had been in the College Program. This stranger overheard us happily talking about WDW and interjected with a long-winded dissertation on why TWDC was the root of all evil. Do you think Disney should care about his opinion? NOTE: I'm not saying anyone here is like that, it's just an extreme example (and an unpleasant experience that has stayed with me all these years

) that illustrates the point that not everyone is going to love Disney or the changes they're making and they can't possibly turn
all of those people around.
4) Not just you, not by a long shot. But in the end, if there is a net gain...