The current remote command only seems to work if the iPad does NOT have a cached iOS waiting to be installed. It would be time saving if the remote command was able to install the cached iOS, or if it's not current - remove it and download the latest iOS for installation.
Alternatively, an option to prevent devices from downloading iOS updates until they have been remotely triggered might be implemented.
At the moment, if a device has already downloaded the iOS update, I have to go and locate it to manually install it. Which almost defeats the purpose of being able to push it to the other devices in the first place.