I tried it on my vagrant environment, I just used helm to deploy KubeVirt, instead of make vagrant-deploy.
I believe in the near future we will come to some final view of our manifests, so I hope it will need minimum maintenance from my side(except new manifests). Yes, it can nice thing to update manifests only per release, I can change container tags to a specific version and update manifests accordingly.
We also can discuss what fields under the manifests we can edit, for example, if someone will want to change the port of virt-api service or to add additional labels...