That remains to be seen, I'm not so sure.
The fact remains, however, that the show was created for anyone who buys a ticket to EPCOT, including Disney die-hards and EPCOT-nostalgists. Alienating the die-hards because they only make up 10-15% of park attendance and the remaining 80%+ of guests won't have strong opinions on the show, in my opinion, probably isn't the best business strategy. When your fanbase turns against you as vehemently as Disney's has over Harmonious, there's a problem.
And it's not like the majority of people who are posting opinions of the show online are "die-hard fans". I'd venture to say that a great many of those who have seen videos of Harm would fall into "the majority of guests" category - It's not as if Disney has kept all this under wraps until the last week. If there were a 80/20 split between positive and negative opinions so far, there'd be some validity to that line of thinking. When it's 5/95... that's not a coincidence, that's a wave crashing down.