I'm confused about what a merger between Seattle Grace and Mercy West would look like. I mean it makes sense...a business merger between two hospitals is reasonable because hospitals are run like businesses. Except that part of what makes a hospital a hospital is the literal space that it occupies. Buildings are harder to merge than businesses.
My hope for the season is that this plotline will ultimately be a vehicle for the introduction of new and interesting characters from MW and not so much about the job cuts at SG.