My two cents. ( Not quite two actually ) I basically have four main issues with show at the moment.
1) Kevin : I'm kinda tired of him. Can he prove to be a bit more useful and less sulking? I mean even Chuck seemed better!
^^ My explanation for the above thoughts : I don't say that the sulking is 'unfair'. Its sure not easy when life throws crap at you and everything goes out of gear. When I said he can probably sulk less, I meant he can perhaps deal with the fact that this now his life a lot better than what is being shown to us. Chuck, when he was a prophet did deal with his fate better than how Kevin is dealing at the moment. Sure, Kevin did discover how to make demon bombs and deciphered stuff from tablet but when he came into picture since episode one of this season, I kinda expected a lot from him and he showed that potential too but down a few episode, he seems have become distraught. Its not about the work he did, its about him. All in all, I'm saying is Kevin is stronger than what is being portrayed about him.
2) The way Sam and Dean's relationship is being dealt with. I'm not saying they should be happy-go-lucky all the time. Its just that their reunions in previous seasons had been dealt with great detail and attention. However, in this season I feel they're lacking somewhere in this aspect. No, I don't expect them to reconcile the moment they fight but when you gives us a reunion, atleast make it feel as if all is good. Although I am glad they decided to stick to each other, to the family business, there are still a lot of unsettled issues between them. I hope creatives are looking into it and we have better stuff to look forward to. :)
3) Driving away new characters : If Benny/Amelia's chapter was closed (if at all its really done with?) because of the fandom's reactions over Dean-Sam persistent quarrels, then I wonder how the show's future will be. Because honestly, you can't drive away everything and expect Dean-Sam to stay 'together-together' for the rest of their lives. They're brothers and above all humans, they need other relations in life too! There was Bobby, Jo, Ellen and others who along the line had always been there for them. If they were meant to be there as friends or foes or anything else, they were still adding up to the story.
4) Bobby's comeback : There was a reason Jim Beaver was at conventions. Can we please know why? Isn't it time already?