Mosaic Permissions and sharing of folders

I have about 50 folders (one for each school) where I grant permissions by sharing.

So the 'contact-person' of each school can add News, Events, Pages and Images to 'their folder'.

I would like to make a 'landing page' for each school , showing news, events and some other things.
Instead of a browser view, I am thinking about using a Mosaic view for the folder.

If I do; Is there a way to prevent anyone (except the admins) editing the Mosaic view while they still can add and edit content in the folder ?

UPDATE: After some thinking: it would be even better if it was possible to restrict editing of some fields/fragments/tiles.

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