Handling Emails on Freshdesk

In Freshdesk, it would help if we have a timestamp for the messages/reply. That would help to use as a condition to route tickets and also to use as a KPI. The current ominroute only allow the routing by creation date of the ticket, but sometimes we have a e-mail/ticket from 5 days ago, for example, and it will not get routed if we have a reply from 2 days ago, for example, but from an older ticket. I understand the idea of older tickets being addressed firstly, but it would help to have the option of using the oldest message/reply as condition to routing tickets rather than the oldest ticket.