I recently found a feature that allows you to quickly migrate the management network from a Distributed Virtual Switch (dvSwitch) to a vStandard Switch (vSwitch). It’s really simple actually. Just log on to a host physically or via iLO, not through the vSphere Client, and select “Restore Standard Switch”.
This will move all NICs associated with the management network off of the dvSwitch and on to a vSwitch. It will not move VMs that may be associated with those NICs or that same network.
DO NOT CHOOSE Restore Network Settings as this will remove ALL network settings on the host returning you to a fresh install environment in regards to your networking.
Hope this helps someone out.