I may be in the minority but I did not enjoy this show at EPCOT last year. I ordered the package so that I could be guaranteed a seat, but it was still very chaotic when getting people into the theater, long waits and rude people. We were seated second row very stage left but that meant that there was a good portion of the show we couldn't see. I realize that hearing is the main focus here anyway but I did not care for the voice of the narrator very much. And it was quite cold (unseasonably so for Florida) that night and those metal benches didn't add any warmth. we didn't stay for the whole show and when we were leaving we finally realized some of the things that we should have "seen" while sitting down.
I have not experienced this at DL but already hearing about the more intimate seating would make me inclined to give it a try (and bring long underwear).
I was at WDW the second week in December and I thought the crowds were very manageable and overall I really enjoyed going to each of the parks/hotels to see how they decorated for the season. So for that reason I'd love to go back to WDW at Christmastime!