Chalk Mode

[Fire-wood]

A useful way of group related nodes together (without group node) would be with a 'chalk-like' mode that allows you to draw a white dashed line in the editor.
For example, if there's compressor related nodes (like compress -> filter -> gain), a dashed outline could be drawn around these nodes to make it clearer what their purpose in the synth is.
(This is also simply a line, so nothing is forced in or out of it, you could have a node on top of the line)