Node-node, unit-unit, and efficiencies changes

[datejada]

Create the steps to include these changes in the structure @jkiviluo

[nnhjy]

Discussion #801 provides some supporting observations regarding this topic.

[clizbe]

@jkiviluo This sounds like it might be an epic issue. Can you break it down into smaller bullets that we can convert into actionable issues as we go?

[jkiviluo]

We're working to have something to present in Leuven. It's epic yes and should then be broken into sub-issues.