The whole point is so that they don't have to change it again for at least a couple of generations. It is the fault of the club as an entity, not the current owners, that we have faffed around with different badges over different generations, that fans have varying tastes and wishes.
Fans can moan as much as they want, I find it hilarious that you are moaning about people moaning. Like you look for a reason to moan just as much.
For all we know the club have had this new badge in mind when they created Melbourne City. They have added the idea of 'City' as the brand for a number of years now, so ditching the FC or Football Club isnt a massive shock. Maybe the club used the badge consultation to verify that what they wanted to do was in line with the supporters to back up their plans. I sincerely doubt that the fans consultation was the 100% key factor in the design of the badge, it was just a part of it. I'd rather they had just done what they wanted, said "get used to it", saying '"look at our track record, have we let you down yet?"
Fans still have the choice to have their favourite badge, use what they want as 'their' badge. doesn't make them less of a fan. I suspect a lot of the disgruntled fans will just get used to it, some ardent ones wont accept certain bits, but thats all part it all.
Hopefully, now, we can have some continuity for the generations to come and draw a line over the subject.