This is a big difference between Orthodoxy and the RC church. We do not have this kind of sharp distinction, by and large, between discipline and dogma.
We consider the Tradition to be one seamless whole, and do not believe that there are parts that can be changed at will, just because they are not dogmatic. The fact that something has been the universal tradition of the Church for 2000 years makes it basically unchangable.
I have talked to traditionalist Roman Catholics who acknowledge this: namely that Orthodoxy is far more immune to the prospect of women priests than is Catholicism, precisely because we do not believe that anyone has the authority to change a tradition of this universality and duration. Some have told me that they are glad that the Orthodox Church exists, since it gives them something to argue with when dealing with the modernists: telling them that such a change would render reunion with Orthodoxy impossible.
Absolutely. This is just one example of why the schism of 1054, tragic as it is, was a necessary element in the economy of salvation. Unfathomable are the ways of the Lord.