Power Wheel
What do you think about editing the power number upon the inital connection done by dragging? What I mean is that currently, you need to connect the reactor node to the equipment node, and then aim at the line to increase or decrease the power. I think it would be nice if the connection, immediately after being made, would remain "active" and allow you to use arrows or scroll wheel to quickly set it up on the desired power level. That is the initial idea I've posted, that you've quoted a few times (thanks for the shoutouts on those!).
This way, you could increase the power level to a higher number much faster, as well as cancel the connection by setting the power level to 0. The connection would stay "active" until you click outside of it, whether on an empty space or on another node.
Though, I do not know if something like this is possible with XAML...
UI scaling
When you say we'll be able to set the scale of UI manually, do you mean that we'll be able to set the scale of the UI as a whole or of each separate element of the UI?