For item #1, I think the confusion is VM migration vs storage migration. VM migration implies moving the VM to a different host/server, while storage migration means moving the VDIs to a different SR. When you have a standalone host, it is my understanding you have to shutdown the VM to migrate it (not move VDI disks).
For item #2, I navigated to Pools-->Network and was able to rename both the network name and description simply by clicking on the item. I was NOT able to do this by navigating to Host-->Network. But, again, my hosts are in a pool. Maybe show a screenshot?