It would be great if JQL could be improved to support wild card search in linkedissues(issuekey, linktype) so you could search by project key. I.E. linkedissues("key-*").

Also it would be good to have the ability to display data on the linked issues.
So I have a ticket and it's linked to 3 other tickets, I would like to be able to set the data I want to see for the linked tickets. Data I would like to see would be the standards, Summary, Assignee, Status, FixVersion, Etc.
I.E. - Issue-1(Issue Key), Issue Summary(Summary), Issue-2(Linked Issue), Linked Summary(Linked Issue Summary), Linked Assignee(Linked Issue Assignee), Linked Status(Linked Issue Status).
Issue-1(Issue Key), Issue Summary(Summary), Issue-3(Linked Issue), Linked Summary(Linked Issue Summary), Linked Assignee(Linked Issue Assignee), Linked Status(Linked Issue Status).
Issue-1(Issue Key), Issue Summary(Summary), Issue-4(Linked Issue), Linked Summary(Linked Issue Summary), Linked Assignee(Linked Issue Assignee), Linked Status(Linked Issue Status).