Currently it appears like numbers without any detail.
More info about these numbers it would be helpful for the visitor & the thread creator
What & How?
Viewers: You can explain more about who actually visited the thread by displaying graph about the visitor.
for e.g. youtube *
Replies: A list of member who participated in the thread with links to their posts
check out my sketch *
* youtube is just an example to demonstrate what I mean. I know XF devloper would create something better than this....
* please don't laugh ...