The Fusion needs a much more fuel efficient base 4 cylinder to be a strong contender against Camry and Accord. That would cost a lot. The 2.0T and 2.7T are both low volume.
Fusion is a missed opportunity/lost generation due to poor planning and implementation. Camry, Accord and Altima will continue to gain momentum leading up to Ford's re-entry into the segment. Essentially starting from scratch which will be very expensive.