Yes, you can control notifications (and custom actions) at the individual user level and lots more customizations and can safely uninstall Smart Locks when using LUM. You can find a complete list of feature on the first post here: [OBSOLETE] Lock User Management (LUM)
You can even set the cleaners to a preset schedule (up to 3 daily/weekly schedules) as an added safety measure so it won’t work outside those hours (I’ve seen cleaners share codes with temp replacements, so pre set schedules can provide additional security).