You're probably right - syntax changes were practically impossible to implement anyway. What upsets me is the mindset a community must be in to propose and pass such a decision - thinking we've reached a somewhat optimal expression of syntax for Python is very proud and foolish.
I don't think anyone is saying that python syntax has reached such an apex of perfection that it cannot be improved.
The two issues that drive this moratorium are the alternate implementations need to catch up with the current state of python. And, more importantly in my view; the need to focus attention on overhauling the standard library and porting it and external packages to python3. This is a resource allocation shift, that's all.
Well if it bothers you so much, you have the freedom/right to not use Python. Furthermore, I sense that the majority does not share your sickness. And I personally see your view a bit distorted, but that would be my view/opinion.