We are considering the following in our roadmap. Please let us know what features you would like to see using our support portal.
Epic - Story Links - At the moment Linked Comments only works with actual issue links. Epic Links are a special type of link that exist between a Parent Epic and a number of child issues. We will be adding support for Linked Comments so that when viewing an Epic a user can view the comments of the child issues.
Keyword Searching - Within the panel we will implement a text searching feature to find comments containing specific keywords or phrases.
Time Line View - We are looking at implementing a graphical timeline view which would display a vertical timeline to make clearer the sequence of commenting events.Type '/' and add some blocks to get started.