I like Hayes fine, I just dislike that they need to totally trash Deluca to make way for him.
I agree Teddy should have spoke to Owen, but given his history she's right to be scared. I'd be scared too. I don't think Amelia will go back to him, but Owen being Owen, he can't not be an involved father. So Teddy who is already insecure about the relationship has to decide if she can deal with the ensuing messiness.
So yeah, Teddy should have spoken to Owen, or at he very least, not slept (if they actually do the deed) with Koracik. TBH I think they need to do some very serious therapy before getting married.
As far as Karev goes, I'm wondering how this ending will go. I see 1 of 3 things happening.
1. Alex is dead. The show remembers that Yang tx her shares on the board to Alex when she left, They pass to Jo
2. Alex transfers shares to Mer
3. Show ignores/forgets about the board shares altogether.
While I think this may be a nice walk down memory lane, I really don't see this as being anything more than awkward.
ETA: And awkward it is.