As you can see in [Overview] Features for Virtual Machines for example, many features that you usually want are already implemented.
So VMs are already very usable via LXD.
There will be additional features (especially to achieve feature parity with containers, I assume (as far as that is possible)) I am sure.
But I don’t really understand what you want.
The ambition is to have a good VM manager, which we have now.
If you have good ideas, propose them to the team via a Feature Request, either on Github or in the Forum (at best in a seperate post).