Perhaps I can throw some perspective on this. My approach to doing the holiday format is to do a much more pared down variation on the station's regular format. Less talk, more music. I do the format and all that my programmer requires and add some info where applicable. On Christmas even less. We do no traffic in the afternoon on Christmas day and my back-sells become very short and sweet. At that point I see the air-staff as station identifiers and greeters more than personalities.
I do believe that one can go overboard, so I try to be aware of when I might go too far. Being a jock, I prefer a station to have someone moving the proceedings along and hopefully we got it right this year. If another station gave a more produced, more talkative show they may just be trying to set themselves apart from their competitor, and that's not a bad thing either as long as they don't overdo it. Many years ago when KFI was music, KOST and KFI had the same programmer. We only went all Christmas on Christmas Eve and Day and it was pre-produced. I was the voice for both stations and as I recall we kept talk to a minimum. I heard a station doing something similar this Christmas and while there was more talk, it was very close to what we used to do. This isn't a bad way to go either. I feel that it's much better than a syndicated show which has no localization or personalities from that station involved. But everyone has their own way of doing it. To each their own.
Happy Holidays!