Have you tried making a 'Remote connection' from the Switch to the DataTable cell (as opposed to the regular "true connection" from Edit>>Connections)? This should do what you want -- both, display the current state of the cell plus write to the cell.
I typically use SnapDelay only when I have to remote to a field device and want the control (Switch) to snap back to its original state if the action requested did not happen at the device.
Regards,
Khalid 🙂