She approached it via/in an undesirable way/route.
I'm not a professional teacher, but I would say that "cunningly circuitous" does not necessairly mean "undesirable". "Circuitous means "roundabout, not straightforward or direct", and while "cunning" can have pejorative overtones, it does not necessarily or intrinsically carry a negative meaning. For example, a soldier sent to scout an enemy post could choose a "cunningly circuitous" route to the target destination, and rather being undesirable, this would almost certainly be expected by their superiors. In a case like that, it would be a failure to use a "cunningly circuitous" route that would be undesirable.
(n.b. - deliberate use of "their" as 3rd person singular epicene pronoun)