yes the OP has much of what I had been thinking as well.
If you look at past events, say the first wintersday the quests were things you could do with a group, you had things you had to jump to different cities to collect (I remember running my first mesmer thru the ascension missions JUST to get to dorks for king jalis, I also remember the gunk guy and all the "lfg gunk" from toa)...
the 2nd wintersday added some nice quests---some of which you could also do with a group. (and the 2 uw ones you could not....that made me unhappy last year)
this wintersday added only 2 new quests which were both solo.....

major disappointment (esp if you didnt have eton). So not much new here and the content was not for groups.
Hats....first year since it was pretty much a new idea they were great! (and I still have mine---never trashed it!). Second year, well with sooo many people unhappy they had missed the first year they did a redressing of them--BUT also gave us 2 new ones as well (and my monk just loves his freezie crown to death)....this year...only 2 hats, one of which they only had to make from a design already in place.....
so once again not much thought into it (yeah the wreath took some time to develop, but they only had to make 1 new design not 4 like they did last year).
They did bring back most of the previous years stuff which is good since there are still a ton of newer people who never got to do them---and the grenches were fixed a bit (I like watching them explode themselves in LA

)..so they did fix part of it, but not for kamadan. And they fixed the gift drop (for the most part---I have a screenie from one of kamdans district with a bunch of gifts on the ledge again this year)....and the lag fest, while partial not anets fault just didnt add any fun to this years event-just frustration.
so my wintersday report card for anet
bringing back previous quests/collectors/presents : A
New quests: .................................................. C
hats: .................................................. ......... C
new content?:......................................... ....... D
(I wont EVEN get into the frustration of the ubersuperuberrarerthansnowinhell mini pet)
so overall this wintersday gets a C--