Actually the best building of the event IMO is a little 2x2 building that produces lots of coins
I agree. I can imagine popping a couple of those little things somewhere, but definitely none of the others.
If I can put my negative nelly hat on for a moment... as usual... For my money the Fairies chapter was the most hideous thing about Elvenar. The Orcs chapter was close, but I could barely bring myself to build a single one of those monstrous building upgrades in my city. I got in and out of chapter 7 as fast as possible then upgraded stuff straight through to the following chapter. So... all of the daily exclusives for this event have those awful purple or pink flowers and they would be banned from my city. The aforementioned little coin house is the one out of them that doesn't have ugly-factor 100, luckily.
Anyway, there's nothing really good enough to replace anything else so it doesn't matter. There is at least one 3x3 pure culture building that might interest me, though, were it not for how it looked.
Others have been saying it for a while, but I can safely say I won't bother to play this event at all. Well... quests will complete automatically and I will spend the currency I get, but I have absolutely no interest in it.