with the new suiteanalytics workbooks, is it possible to set a permission to read only for certain users/roles?

Yes, in your workbook there is a share button next to the save button on the top right. There you can share your workbook with users/roles and then click save

@Artur_K what i’m after, though, is the ability to set permissions so certain people i share with can’t mess with fields/layouts/etc