Nerfed him into the ground? wtf are you talking about, they nerfed only 1 of his abilities and the nerf only decreased its effectiveness by about 15%. It was perfectly justified as it was undoubtedly the most OP ability in the game, 3 effects for a low mana cost, and low recharge. His 3 other skills are effective as well, and 2 of them could use small nerfs as well.
And wtf are you talking about overextending? If there's any demigod who can escape death after overextending, it is definitely erebus. He has a freakin teleport with a low recharge if you didn't notice, and can turn invulnerable. He also has one of the highest base movements speeds.
I think someone is just a little pissed off because their cookie cutter build just became a little weaker...