Support champs make up for lack of farm by grabbing assists in team fights, and ganks. Any support is viable without farm as the enemy team will likely have a support without farm as well so they are equally squishy, or their team has two champs that have half the farm as your Carry and get totally obliterated. Leona, Shen, Maokai, Rammus, Alistar, Zilean, Gangplank, Janna, Galio can all support bot very good without any farm at all, simply by buying Heart of Gold.
The recent changes didn't nerf Support champs as much as try and force a more aggressive playstyle by beefing up their dps in exchange for lowering their healing and sustain.
The recent changes didn't nerf Support champs as much as try and force a more aggressive playstyle by beefing up their dps in exchange for lowering their healing and sustain.

