I think RDF should be turned on, cause that's the easiest way to go to the coresponding dungeons and since Lordaeron has so much players online, i bet ppl will use it a lot. Why should we the normal players get back to the era of vanilla (u warmane are doing this by disabling on purpose) when we can use the feature which is in front of our screens, makes it easier to go dungeons, isntances, u get rewards (satchel, gold, etc.) ..
I am not the one who can tell u what to do or what not, but just think about it a little bit more! :)