Matt, best solution for you will be to review Atlassian's release notes. Each organization has different needs so the benefits will change accordingly.
Go to https://confluence.atlassian.com/display/JIRA/Production+Releases and work your way up or down to understand what new features were added (quite a lot in your case), what bugs were fixed.
I can point out that you'll have the ability to use a lot of updated plugin versions, which is quite important to most users.
...word of mouth, so by 2016, we were working with several other entities on campus to implement Jira Service Desk . The Atlassian motto of “for every team” has really come true for us in this case. We...
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