Did you grab your Clockwork Robot Bot from under the tree this Winter's Veil? I did, and I was thrilled to find that the little wind-up robot is more or less what we asked for a while back-- when two of these guys are summoned next to each other, they'll battle it out. Now, they only have a few HP, so really, just one hit from one usually takes the other out.
Unless you can buff them, that is. A few people found that you could cast Power Word: Shield and Power Word: Fortitude on the bots when they first came out, which meant that you could give them more health and make them invincible for a few seconds. Unfortunately, Max Bliss found out that's not the case any more-- Blizzard has performed a clockwork nerf, and the bots are now unbuffable. Lame.
Sure it may be imbalanced that some people can buff their bots and make them live longer, but this is hardly an instance of life or death. Let the bots be buffed, Blizzard!