Andrew: I though the same as you...that it would still be the Dead with the loss of anyone else BUT Jerry. I was wrong...while it was different without him (no one can every replace Jerry), it was still the Dead. Hearing the rest of the band, with supplementation from guests like Warren Haines, Joan Osborn, Steve Winwood, Jimmy Herring/Jeff Chimenti/et al, the vibe was still there.
The moral of the story: Life is seldom ever static...things inevitably change and not usually for the better. The Dead with Jerry constantly evolved, and not always for the best. It's all good, though.