User blog comment:Calvincambridge30/Versus/@comment-27006668-20151021135759/@comment-3481504-20151021174013

Cas' powers were drastically dwindled from the expelling angels spell, which, honestly, made angels extremely weak after that point. Seraph Cas from seasons 6 and 7 would've been much tougher for Dean to have taken down. For example, Cas could've just teleported around the room constantly until Dean got dizzy and passed out.