I've said before on how I feel Sightstone is obsolete due to trinkets doing its function in a healthier fashion (placing the burden of vision on the team rather than on one person), while also having absolutely terrible slot efficiency. And since junglers end up using the item better than supports do, it's safe to say that it's not working entirely as intended.
I'm of the opinion that Sightstone could be removed to shift more of the warding burden off supports, but I'm sure people will hate that idea. So to ask, what's being done about SS and RSS in preparation for Season 6? I hope it's something besides a big fat "NOTHING!"