Archiving Projects with Zephyr Scale Tests still active

[shane-nz]

I am new to the system admin role, my organisation asked me to help improve the efficiency of the Jira application, I have come to understand that archiving JIRA projects that are inactive (no new issue updates for 90+days) may possibly help.

After my first round of archiving took place, the Quality Engineering Leads have pointed out that their Zephyr Scale Test suite now is unavailable. 

Despite the squad disbanding due to organisational restructure and the project showing no activity in the admin table, it appears some Tester have been using the Test Cycles etc from the old squad project whilst assigned/aligned to a newer(more active) squad project.

What should I do. 

Keep Inactive projects open so that the Test Suite is available, at the cost of a Inefficient Jira application.  

Enforce a process to Migrate/Clone the Test Suite from one project to another?

Are their other options I haven't considered?