I've felt like the past three seasons were a bit more reactive, whereas this season I feel like Sam and Dean are building up their arsenal again, making allies and absorbing new knowledge. It seems like they were on the run for so long.

And I love Abbaddon and her new evil.

So the ways that Angels, Demons, Reapers etc continue to adapt works for me, too. It seems like Sam and Dean are finally going to be able to get their heads above water.

I hope that Dean finds a way to help Cas too.