have a time since last reply field / filter
you can see how long since a ticket has been created in teh default view , and WHO was last to post to the ticket but I would find it very useful if we could see how long since the LAST reply/post/ or comment. Preferably both last reply and last comment.
Taking this further - be able to hover above the last reply/post or last comment time stamp and see a preview popup of the text.
The duration is not from the creation date. It is from the last reply. The only time where that may not seem accurate is when a user replies multiple times without having another user reply. In that case the duration is based off of their first reply (of the set of replies that have not been responded to yet)