Hi all, again!
I think all Hyper-V admins use VMM for hypervisor and VMs management. And Veeam use it too to discover Hyper-V host and clusters.
I think many of admins that use VMM use some fields of VM Properties in VMM, like description, Cloud, ownership, access and others. And I think if Veeam will backup this fields at least as read only options this help administrators in cases when VM was deleted from VMM side.
As a best offer is ability to recover this data to VMM VM object with VM Recovery.
And as one of profits from this side - you can use VMM field "Owner" to relize RBAC for EndUser VM Recovery. Assume I create VM "TestVM1" and "TestVM2" in VMM. Set owners for this VMs in VMM: "TestVM1" - "contoso\user1","TestVM2" - "contoso\user2", and after backup this users can take backups and restore his own VMs only.