Enable WP comments and the WP comments are written to the XenForo thread for that post. This is an incomplete feature, and why XenWord 3.0 is in alpha. The replies in XenForo are not yet written to WordPress -- but the WP comments are written to XenForo. The XenForo replies will display below the WordPress post.
So if I understand this correctly what currently happens is
Replies to the article made on WP and replies to thread made on Xenforo display together on the Xenforo side (that is to say they all appear in order on the thread). However, if someone on the blog responds to a reply made on the forum, these two conversations would essentially happen in two different threads on the blog - one that displays all Xenforo replies and one that displays all WP replies?
My other question is does the fact that writing the WP replies to Xenforo duplicate that reply within the Xenforo section of replies? If so - this might be an easy way to build something that'd keep things in-line. You'd just have to hide all the WP posts, write everything to Xenforo and then write Xenforo back to WP displaying everything inline together on one thread in both places.
Does that make sense? Or am I misunderstanding something. Anyway - I'm okay with the current way I have things setup forcing people back to the forum to make replies and keeping the conversation part of the site on the forum itself, this was just something that'd be nice to have in a future release 3.x or even 4.x