I am with you on every point.
I think that would be perfect for Eileen. At first I thought she might have been a love interest for Sam, but since we are heading towards the end of this shows run, I can't see that happening now. I love Eileen, and pleased Sam bought her back to life, she deserved some happiness.
I hope its not the last we see of Jack, I would hate not to see him in action again. I would love Cas to end up as God, and he would be the most likely candidate.
As for the bunker, NO way 8 years of this set is worth its weight in gold. Its been there only real home and base during this time. Its an important part of who they are now and should stay this way. We are on the same page as for killing either or both brothers. But, for some reason, the more I read about a possible ending, I feel this is the most obvious way its gonna end. Sam snapping Dean's neck in his dreams serves up one possible ending. That God Bullet, is affecting the way Sam is acting for sure, and what part its going to play later. It sure has caused him some headaches.