This is not so much about Arnotts more than public opinion.
Do some companies get the flavour perfect the first time?
Take Peanut Butter and Nutella for example. Did they get the taste right he first time, or was it because there was nothing to compare it too at the time?
If they decided to change their recipes, do you think there would be an uproar like right now with the new Shapes flavour?
I'm an extremely logic thinker. I wouldn't complain about flavour changes, doing things differently, because I couldn't 100% say that if the recipes were flipped back to front, that I would not 'like' the new(old) flavour.
As everyone know, it's quite hard to implement a new way of doing something that has been done a certain way for a long time. You will have everyone thinking the new way is silly, when in reality, if you thought about the processes, it makes sense.
Is this Arnotts flavour change an example of this type of mentality? Do you think if Shapes started with the new flavour, and changed it to the old flavour, people would be having the same reaction?
Sorry if it reads funny, I was always terrible at English.
If it ain't broke, don't fix it.
See also:
https://en.wikipedia.org/wiki/New_Coke