The only significant change I've noticed re: comments are how the nested chains collapse: instead of the intuitive [+] and [-] at the parent comment, there's a line that runs alongside the chain. Click that line and it collapses.

It's not as easy to figure out on your own, but it's a significant improvement IMO.

Same. Medication has really smoothed out the rough spots for me, but Robin taking his life really raised the water level, so to speak.

After getting past it, I thought about the effect someone (whom I'd never met) taking committing suicide had on me. I've since expanded that thought to my family, which has been constructive for me.