I don't think the ability to name instances should be locked behind VRC+. Named public instances are far more attractive to players than unnamed ones, which means non-subscribers will be discouraged from making their own instances. This is already somewhat proven by the popularity of Group Public instances, not because the groups are moderating them (they rarely are), but simply because players like the names associated with these instances. Additionally, by locking naming behind VRC+, non-subscribers are encouraged to use awkward workarounds like using the API or editing website links. This creates an unnecessary barrier for regular players and makes the feature feel incomplete. Since instance naming will be widespread and an objective improvement over the old system, it feels wrong to treat it as a premium perk rather than a core upgrade available to everyone.