I just saw the announcement. Seems like another pointless feature. I’ve been on LJ for a little over 10 years now and I never felt the need for such a feature. To be honest, I prefer to read the other comments on a post before I comment, because what I want to say/ask might have already been said. In some cases that might not be an issue or even unavoidable, but in others my whole comment might be pointless if I’m missing information from other comments. What’s the point in asking a question that has already been answered? How many times do you want to answer meme questions for the same fandom just because people used the quick comment option and were too lazy to check if this fandom has already been done? IMO, the quick comment feature might turn out to be more of a burden for OPs than a help for commenters.