The wording for today's quest is somewhat unclear, you can build any of those items, you are not required to build premium items. I hope this helps.
Regarding the style of this event:
The last event we ran was the Halloween event, which contained no luck based elements as it was quest-based. Then we had the summer event, with a luck-based wheel (though players could choose the time to play based on the odds, so it was not entirely random). The easter event last year had a store, and other events in 2013 were quest based.
So, to sum up, we do have a variety of events which are run throughout the year, and we think variety is good. If one event is not as much to your liking, there will always be another event soon which might be better suited to your tastes. I would like to ask for your understanding in this event that we cannot cater for every player all of the time - some will like this one better, others might prefer events such as the Halloween riddles. What we can do though is promise you a good variety of events to come in 2014, too. So there should be something for everyone