Yes, that's the method I referred to earlier. For someone with a lot of shares to set up and a lot of computers to modify, the mount -a method is still a lot simpler, even if it must be invoked often.
I've been hoping that the noauto,x-systemd.automount options for /etc/fstab might be somehow refined to do the job as they once did. Obviously, that method worked fine (for a while), and allowed us to use fstab as it was intended to be used.
And once the correct options were determined, they could be quickly and easily copied and pasted to everywhere they were needed in every /etc/fstab on every machine that needs access to those shares. I haven't given up hope yet.
EDIT: I still believe that a way might be found to automatically invoke mount -a with admin permissions after the network has been loaded. Or that an option for use in /etc/fstab might be able to do that.