Very cool indeed; you can for example add dedicated send channels inside a group with this one. Saveable as a template alongside the rest of the group. Stuff like that.
And I don't mean sending to the main return/fx channels in the project, I mean creating dedicated returns inside a group, then placing this little utility (with its output muted) in parallel effect rack chains on those group channels you wish to send from. Have a passthrough chain with nothing on it for the dry signal, and additional chains for these sender device instances. Set them to send into those channels in the group with effects on them, and then you can simply control these "local" send levels with the rack chain level controls -- EDIT: you must actually do the level control with a Utility device before the sender
as the rack chain level control sets the output
level of the whole chain, so it doesn't effect the level the signal hits the sender, a slight brain fart there. Local send levels mappable to rack macros in any case, etc etc. All sorts of coolness and routing hacks doable with this one!