Even for other passing trains, traction change will happen mostly at Wadi only, as it is already crew change point. GR can take up LC for passing trains when it has both minimum infra to handle Elocos, as well as lobby for crew for these passing trains setup there.
This is one of the reasons why trains like Venkatadri, KCG-CGL etc. which follows KCG-DHONE-GY-RU route are still plying with Dloco till RU.
GY can do LC, Dhone is crew change point both can't do two things right now. I have heard that a...
more... proposal has been passed to set up ETS at Dhone to handle LC(don't have written proof. Just heard.).
Till then GR can see Elocos with GR terminating trains like GR-HYB ICe and pass.