I don't know what value non-developers are getting out of Jira, because I've been asked to produce reports out of Jira at different times and the only thing they ever want is "give me a list of all the X" or "graph the number Y across all the projects".
The one thing they all do is go in and mess with the issue workflows: they never improve the workflows, but they sure love adding states and restricted transitions and renaming them...and then promptly ignore all of it because it turns out your 3 layers of "review" transitions don't actually have any staff assigned to look at them, it's just all the same guy who either spends all his time updating the issue as he works on it or just hits the transition button 3 times when he's actually done with it.
The one thing they all do is go in and mess with the issue workflows: they never improve the workflows, but they sure love adding states and restricted transitions and renaming them...and then promptly ignore all of it because it turns out your 3 layers of "review" transitions don't actually have any staff assigned to look at them, it's just all the same guy who either spends all his time updating the issue as he works on it or just hits the transition button 3 times when he's actually done with it.