I think they knew that they were going to alienate a good number of the fans, and I don't think they care so much. As far as I'm concerned there are two ways that a franchise can go. You can start making it for the fans, or you can keep the control in some other place.
Now, I really don't see that as all that bad, to be honest. The fact is that if you made a series (mini-series, movie, whatever) designed to appeal only to the loyal fans of the original, it would be a ratings flop. In order for this to succeed, it has to find a new audience, and that involves changing some things. Did they change too many things? Possibly, but I'm still willing to give it a chance, Ultimately it all comes down to business, and this is the business of entertainment in the 21st century. Love it or leave it (hmm, why is it that I don't watch much TV anymore???)