I don’t know the ETA but AFAIK there are plans to expose Admin vetted queries to Moderators via the dashboard.
I am a moderator at SitePoint, not an admin, so I don’t have access to Data Explorer there. I do have access to Data Explorer on my localhost installs so I have some experience with what it is able to do.
Although the plugin has safety built in as far as protecting the database, it is very powerful in terms of what data it can provide. Some of which should, IMHO, not be available to any other than an admin. (eg. both personal and private information).
On the other hand, there have been a few times I have petitioned our admin to run a query for me and reply back with the results and he has gracefully obliged.