First of all, there is no reason to think that there has been any significant negative reaction to this. The negative reaction that you see, that is shaping your perception of it being so large, is limited in scope - very limited in scope - and most likely well within the "insignificant" range. However, to see that, you need to measure things against Disney's objectives (long-term shareholder value) rather than against your own (how happy you personally feel inside).
No, not "all at once". Many of us realized it as early as the 1980s; and while the nature of everything online has changed since then, the changes didn't ever make the folks who regularly participate in WDW-related discussions any more significant; all that has happened is that the reasons for a determination of insignificance changed over time.
I doubt you're the only one, but I'll be happy to lead up the charge against your perspective. Fantasyland is many times more important than the monorail to start with, and the Fantasyland expansion is almost surely going to pay-off, for Disney and for its guests, more than spending a similar amount of money on the monorail.
Do you realize that you've outlined a self-fulfilling prophesy? Read the words your wrote... they basically say that no matter what, if anything is ever taken away, then eventually there will be nothing. There is no consideration within
what you've written for the fact that while things are taken away other things are added, nor for the difference between taking away things of different importances. By blurring the line between Fantasyland and monorails, as mom2rtk did, it is impossible to see the reality of the situation.
Then you're not paying attention. Regardless, add back in reality, that Disney is adding and subtracting at the same time, and you'll see that it is just like every other top-notch entertainment enterprise, in that regard.
Whatever are you talking about? While it is true that Michael Eisner led Disney with far more vision that fostered in fans a far greater feeling of the magic, not that much has changed. Bob Iger needs to be viewed as a bridge, from Eisner to the next visionary. He or she is coming. Iger is being a good steward in the meantime.