This will be a great functionality. Yes sharing with comments will be fantastic.
i 100% agree with Arsalan Shah simply because those looking for a subject will often want to know what others think of the content,opinions ect. particularly if your community has reached a point of high interactivity it will encourage others to want to take a look and join in,
In my opinion comments of users should be shared with blog by means when i share a blog to public, in bottom a public should able to see comments.
Lets see others opinion ;)