The "Premium Seating" in Y is somewhat of a joke, I think we all agree. The fact that Golds and Plats can get exit row seats is a plus but those are really the only "great" rows in Y on the 752s.
To me, CO should jump at the opportunity to increase seat price while reducing most of the costs. It is completely out of my price range (and my company's) for me to fly BF on a 752 to CPH but if I could fly E+ for $500 more, they would pay.
You are increasing the profit per seat when you add an E+ section (even if it's only a few rows) and creating another business friendly product, especially for smaller businesses.
rkkwan is right, using the E+ configuration on the EWR-Florida routes may be bad but then again, a few of the other threads have pointed out that domestic travel may lose the 752s altogether because of pressure on the route schedules for next year.