gerrit:1035601, which will allow us to restrict unfuzzying translations, is under review. Once that is merged and deployed, I propose we limit it to autoconfirmed users, which is slightly more lenient than the current Special:AbuseFilter/96 (which requires 20 edits). This should be uncontroversial as a pro-forma action given the existing abuse filter, but I should get consensus anyway per m:Requesting wiki configuration changes.
Unlike the abuse filter, this applies to all edits, even ones that do change the tunit page. The changes to the tunit page are still applied, but the unit is left marked as fuzzy.