One workflow improvement is direct node selection with the Node tool. Currently, you need to hold down Ctrl to do this, or have the object selected. However, holding down Ctrl is redundant in this case, because you already switched between the Node and Move tool.
This is the way it works in Illustrator: holding Ctrl toggles the Node tool to become the Move tool. In Designer, both the Move tool and Node tool gain access to Node selection while holding Ctrl and have object selection enabled by default. By differentiating between the move and node tool, the node tool would get immediate access to node level editing, which is what the name of the tool suggests.
Node tool select across groups.mp4