Had no idea they included the DVD, though I really hate that trend of packaging. You can always buy DVDs separately and cheaper, and if you're buying Blu Ray I'd figure you don't really want DVDs, if I could just get a cheaper package of nothing but BRD's I'd take it in a heartbeat. And getting it in a digital format doesn't mean a thing for me, as far as I'm concerned it should be standard and not considered an additional cost.
Does the TD set not have many bonus features? If it had commentaries on all 8, I'd be way more understanding of the cost.