Is it currently possible or on the roadmap, to be able to use Noesis views in editor windows in, rather than just in game? I have a Noesis control I would love to use in an editor window for various tools we build for users in Unity.

Our beta plugin, which includes Studio (available in this thread), uses Noesis within an EditorWindow. You can inspect the source code.

It may not be exactly what you need, but it could serve as a useful starting point

Awesome, thank you. I will have a look!