AH HA!!! I was prepared for an Advent Calendar this year!
In any case, I don't know what I can say that'll be any different from last year. In fact, many of the elements from last year are still in it (like it was re-skinned). The scenery is different, but the character is the same (probably will change in the same order as last year too). Music is different, but there's still that awkward snow walking effect (even the SFX of crunching snow). The little interaction with the TV is new, but things will probably proceed the same (like the tree looking more lively over the course of the month).
But the main purpose of this isn't really the presentation rather than it really being about artists promoting their work together. Some will be cute, others will be awesome, few will be funny, and a couple will be weird. You can't really judge this as a whole because the artists will be approaching this much like last year.
Bottom line is that it's a lot like last year with a few things different but with the same purpose of helping artist to show off their work. Which is why I think it's only appropriate that I should give this the same score I gave last year's.
EDIT: In reply to GeoKureli's comment, I try to not let others push me into doing things, but I know what it's like when you put a lot of effort into something and people look over it towards one certain issue.... it was on a story called, 'CYOA: Bronytale'. I don't want to be like that guy and I won't deny that more and more things have been added over the past 6 days. So how's this, I'll give 4 stars for now and wait until everything is revealed until I consider on giving it that last star.
EDIT X-MAS DAY: Okay okay. You fixed a lot of the issues, made a little murder mystery, let us do the Timewarp. This has been a lot more interactive than last year's or even any Advent Calendar I'm familiar with. You deserve that last star.