It would be great, if the issue detail view would get reloaded automatically, if another user modify´s the issue in any way. Of course only, if you are in a "read state", which means you are not currently modifying the ticket yourself. This case is already handled by redmine, which notifys you of new changes, if you submit yours.

this feature would be useful, if you have a tab with an issue open for a longer time and could miss important updates, because you forget to reload by hand.