Personally, I'd rather have a Duel Deck that is fun to play over one that is good value since those are fun to play with my more casual friends. It was certainly appreciated that Izzet vs Golgari was both. From looking at the deck lists HvM doesn't seem that interesting since it seems like it'll just be "aura'ed guys vs big creature slugfest".
Yea but good cards are fun to play with.