At this point you would have to assume he opts in, but that's a long ways down the road. I also think the Twins would have given him that 4 year extension...just not the rest. I think that's the thing about trades, we always want a clear winner and loser, but trades can often times just come out eh or even in the long run. Obviously, we won't know for awhile.
It was Berrios and Ober, which I understand is a pretty SSS, Ober has injury problems in the past and not a fantastic comparison, but I have seen his name in a couple trade proposal threads, which would be quite crazy to me.