Having played through most of the event, my feedback is:
* still loving the mechanic of brushes, spades and dynamite to advance and how using them wisely gives you an advantage;
* very happy that we can find portraits, but please add new (old) portraits to be found every time! Older players who have found portraits in earlier events will not get any new portraits to fill the gaps in their collection, even though there are still are many such gaps!
* please consider announcing that to complete the main prize, it is wise to try and complete the calendar / puzzle box. I managed to get it complete because I managed to complete the tablets once, and use the tools wisely. Many players however will need the puzzle box to complete the main prize;
* Please make it possible to swap tablets. So many people cannot finish that part of the event because of bad luck!
* getting daily prizes seems indeed to be harder than normal. I usually get a large amount of dailies and thus save up my event currency for a good daily. This year the results were disappointing and I heard that from many others (though peopole who have luck in that department are seldom heard, of course)
* The main prize is fine. I don't like the design, and would prefer keeping the World Fair for looks, but the Wheel is much better. If only we could keep the desig of the one and replace it with the stats of the other... I've had the same dilemma with many of the other prizes as well. Such as the three Fall windmills, the Ships verus the Trains, and so on. Ah well.
* The prizes for the tablets quests are still mostly rubbish, but that seems intentional. *shrugs* Cannot have it all, I guess.
* I miss the option to win buildings from earlier Historical Event questlines. The Auction House seems to have taken over that role. That waters down the unique function of this event. Just the portraits remain (happy about that, though!)
* I repeat my request to remove the gem shard as a daily quest option, or to make sure that the second option is always a worthwhile one. Gem shards are a very bad alternative since they given only one fifth of a prize, when compared to the other daily rewards. If you turn the daily prize into a gem rather than a shard, it might be acceptable. Or just add the shard as a third reward option.