I agree there's a lot more, but what I meant by "They stopped talking and misunderstanding grew over the centuries, causing the wide schism, which is now being bridged" reflects the fact that the two sides just stopped talking, no councils to discuss theological matters or anything. So, any issues of dispute were never discussed with BOTH sides to arrive at a conclusion, and they just lasted.
I agree. I just wanted to make sure others who read this understand that this was not the only issue.
Needless to say, continuous talk and refinement is a must and it will hopefully continue until full communion.