But they weren't dedicated *to one cabin*. They worked for all the people with concierge level.
IMO there's Concierge and there's Disney concierge.
DCL's version is arguably better than their resorts, but it's still not rock star level of service.

A lounge with some extra food you've paid for and a (bad IMO) espresso machine and some Evian and waiting in line for the couple of concierges at the desk vs waiting in line for the 7 guest services people isn't THAT big of a deal. IMO.
But then we felt that the concierge that everyone loves was condescending and overly cheesy, and I didn't like the experience of the cabana at all (DH and DS disagree on the cabana), so that's where I'm coming from. I do like a nice club level if it's at a decent value.
Oh and our first concierge stateroom on DCL was a whopping $300ish more total than the room we had booked already, and the second time concierge on Dream wasn't that much higher than that, so paying through the nose for concierge just isn't my style.