I just wanted to add my 2 cents; I liked global chat. It was cool to be able to switch it on and connect with someone else ingame, and then switch it off when it became boring or spammed. I understand there were technical issues with it, but I feel like a simple limit on message submit rate would have solved spamming, and ctrl c solved everything else. For the people who hated it and didn't want to deal with it, you never had to see it.
I know it isn't coming back, and my opinion definately doesn't matter, but there it is all the same.