This winter event is not at all attractive to me.
I don't really like the rigidity of placing a set of buildings, as it constrains space options to much. However, this event set is particularly tough, as it seems the only option is to put cars behind the train in a line. Just too restricting.
Much more importantly, I don't like the idea of a precedent being set that there is no alternative to spending diamonds to get a particular type of event reward.
Up to now, you could almost always have a decent shot to get the main event building and/or any event bonus prizes by playing strategically, and playing each day. You might have to choose between the main building or another special building, but either choice was always open simply by playing consistently and carefully.
Before this, diamond players were largely distinguished by the quantity of event items they could obtain; but every player had a chance to get any one type of event building or set of prizes.
Now, they have introduced a real 2-tier system, where only diamond players can get certain event rewards. Admittedly, this time, the reindeer + diamonds only buy items you could eventually get from a DS or the AD. But it is easy to see how special event buildings, like the tactician’s tower, will start to become only available for those willing to spend diamonds for some “Bonus Event set”.
I’m going to pass on this event on the live savers. As someone else mentioned, I’ll see if still have time to work on getting a 2nd Asylum on my main worlds, which is much more useful IMHO.