Luc,
I thought this to be the case myself and I tried it, but it doesn't work. The problem I am having is our 1000v has a uplink portgroup called "unused/quarantined" and it is adding the physical interface to that on this command:
$VDSwitch | Add-VDSwitchPhysicalNetworkAdapter-VMHostNetworkAdapter$vmhostadapter-Confirm:$false
From there I am trying to have the physical adapter added to a uplink port group 10G-phys. I think it may be something wierd going on with our 1000v though because i sear this command used to work.