1. No, scoundrels/operatives have been nerfed the most thus far.
2. Commando Survivability was too high, regardless of spec. BW is trying to avoid the WoW Paladin problem now, rather than later. Also, a guildie of mine stated that the Medic changes merely meant that he would no longer be able to "heal through stupid" anymore.
3. No, this is what balancing is. Sages got hit hard too, Sawbones Scoundrels got buffed (finally).
TL;DR: The healers who have been facerolling through content will actually have to bring their "A" game, not their "Zzzzz" game. Thus, the whine.