The ordination of women, for example caused so much acrimony and strife not only within dioceses but within congregations, bullying by bishops wishing to impose women priests on parishes which didn't t want them, and congregations refusing to recognise the ordinations of women. Different attitudes to sexual morality, marriage, divorce, homosexuality; and that was on top of the historical differences which existed between the various groupings within Anglicanism.
Also, reasonable discussion between them was practically unachievable because it was impossible to appeal to any authority as each had its own.
The same thing is happening now in the Catholic Church as factions vie with each other to change or to block change in doctrine and praxis; bishops and bishops' conferences contradict each other and there seems to be no direction or guidance from Rome. We are rapidly becoming a group sof semi-autonomous Churches rather than one Church.