The ability to link requests is very useful. It would be even more so if there was a column on the Requests page that showed that requests were linked.
For example, this could be achieved by adding a "Linked to" column and putting the ID number of the request to which others have been linked.
The columns might look like this:
ID Linked to Subject...
1 Issue 1
2 Issue 2
3 2 Same issue as ID 2
5 Issue 3
6 2 Same issue as ID 2
...
No entry in the Linked to column means no linked tickets. The number "2" in the Linked to column records #3 and #6 indicated that those 2 records are linked to ticket ID #2