User blog comment:Calvincambridge30/Versus/@comment-79.115.70.206-20151016204748/@comment-27006668-20151019131602

Just because He said he would've done away with hell completely doesn't mean he COULD'VE done away with hell completely. He had a habit of overestimating his power at that time. He also said in that same scene that he needed to keep Michael and Lucifer's cage. & The angel warding didn't work the same reason the angel blade didn't work. Castiel was no longer an angel.