The sharing doesn't bother me so much, just look for a quest that doesn't have a [4] in front of it. Share it and hit my accept everything macro. Seemed pretty painless to me.

I do hate when I have to clear out quests I skipped for everyone in my group. You have to scroll through and drop the quest and confirm you wanted to drop it for each character... plus it resets the quest log window to the top quest so you have to scroll through to find the next one to drop. Damn that's annoying.

What I need is a party quest synchronization addon -- to add/drop quests based on your main's quest log. That would be fancy.