Powered off VM in standoff mode
When users are creating VMs and powering them off still it takes up resources i.e. memory from the hyper-v hosts. Now if it was possible to create something like standoff mode where the VMs are not taking resources and it will not power on automatically. Based on SCVMM if you have a cluster the cluster takes into account powered off VMs in the cluster resource pool. This will limit the risk of SCVMM to be overcommited. There might be some custom time before the VMs should be put into standoff mode automatically if the VMs are not set as Highly Available.
I was not sure if I was going to put this into System Center ideas or WAP ideas, it might be both, because it connects to WAP and SCVMM.