I just thought a little bit longer about it. I even think that a shut-down scheduler is even more important for "small" clients than for "enterprise" clients. Enterprise solutions normally run theirs servers 24 hours a day, 7 days a week, 52 weeks a year without shutting them down. Especially the smaller clients (in our case a dentist practice) have the need of it. We don't have patients at weekends, so we would like the server to shut down on Friday night after all backups are done and nobody is in the pracice anymore.
I have discussed this with our development team and there are no future planes to implement this in NAS-XSR SMB, it was designed from the beginning for Enterprise versions.