A few things make me reluctant for this event.
First of all, there is too much chance involved. Which translates to: the number of moments when you feel disappointment / frustration is too high in relation to the number of moments when you have good luck / a sense of achievement.
This is the case both in gathering florins and in whether or not you get parts of the set (the special prizes). In addition to setting players up for many disappointments (only very few will be lucky most of the time) this means that dedicated, active people who are unlucky may do much worse than lucky players who don't put in much of an effort. That does not feel right to me.
Secondly, having a maximum on the number of tickets you can have, without losing the hourly accumulation, hampers strategic play.
You need a hoard of tickets to have a reasonable chance at winning the games when there finally is a good stash of florins to win. But you cannot have more 11 tickets without the timer stopping. So you need to keep logging in to use up tickets and not let the number reach 11. And when you get tickets from a quest, you need to use them up even if there are no good prizes. That is frustrating. A beter option would be for the quests to award a chest / envelope of tickets that you can open when you need them.
I remember that was the case when this type of event was first introduced. Apparently they decided to scrap that option. Not sure why.
Apart from that, gathering florins depends on whether or not your neighbors are active and leave a nice prize pot. Even if you yourself are active, you may not be able to gather a good amount of currency. I don't think players should suffer if they happen to be in a fairly inactive neighborhood.
Thirdly, it would be better if you could win selection kits instead of parts of the set. This is conjnected to strategy: it is unwise tyo spend florins early on. You need a good stash of florins to buy double-your-chances when the pot is full, so you need to wait until later on in the event to be able to afford spending florins in any significant amount. That makes it harder to complete the set.
All in all, I prefer holding out for the cherry blossem sets. I love that design, and the plaza doesn't do much for me (mater of taste, I read that many people do like the design). The event for me has too many downsides to want to invest much in it. I prefer doing the settlements instead.
I haven't heard anyone who is hyped about the Vikings settlement. I expect most people doing it are just doing the 1st 5 quests to get the 25FP and then starting over repeatedly.
Well, I am excited about Vikings. Yggdrasil is an amazing building, easily outdoing many other main event buildings on 3x3. I'm playing settlements on beta (Yggdrasil currently at lvl 4) and on 5 live worlds (doing my second settlement) and still going strong!
Finally, I see that many people are voicing that they prefer being able to continue upgrading earlier / existing event buildings, than having new ones for every event.
An option might be to offer both, such as Halloween which offered Graveyard upgrades and a smaller new event building. I'd prefer to have just a continuation of earlier buildings, but if inno has reasons to keep introducing new buildings, than at least offer a choice between the new set pieces as a daily prize, and upgrades for the Grand Bridge.