I like the improvements, but the instances of the word 'reply' seem to dominate the pages.
I wanted to see if anyone else had commented on this, but a quick page search turned up 71 instances of 'reply' so I couldn't sift through it. :)
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... okay I made my point. ;)
I still feel like the option to reply should be a right side of the screen option. Not left. Gmail's reply button is an image (arrow arcing to the left), located on the right hand side. Go with something like that. I keep confusing the text 'reply' as meaningful text I should be reading. It makes scanning clumsy to my eyes.
Also, there is still too much white space vertically. :(
I think part of the problem might be that this design gives too much prominence to 'who' is replying, vs. 'what' they are saying. So far, in wiki conversations, I care more about the content of the reply, and 'who' is replying is secondary. Wiki's are about the creation of content, other discussion forums (social media) are more about 'look at me' posting. I think if the design slid the author's names back to the end of posts, and didn't give them a separate line, everything would be more readable.
That and I keep wanting to reduce the font size by 5%. Too big! I'm not 80. :)