Has there been a single, solitary person who has been successful booking a multi-city itenerary for award travel on the web site since they went to the 3-tier system? I'm still getting "We're sorry. One or more of the flights you selected just sold out. Please search again to view and select alternate flights."
C'mon, Delta, it seems like you would be working day and night if something this major was completely broken on your web site. And if day and night for a week wasn't enough time to fix the problem, then you had no business rolling out this functionality when you did.