What settings do you want to lock? Qobuz is not like Roon and has no DSP functions. There are settings related to your account parameters such as how many tracks at a time can be downloaded for purchased downloads but these are not available via the existing Mosaic access to Qobuz so in this respect Connect would not help. Of course we do not know what additions Connect may provide until we have it but I have not seen any references to such a feature in the publicity.
So why not use Mosaic for Qobuz when you have guests ? As this is a dCS forum I assume you have it.