Positive feedback: I like that there is a new event rather than just a repeat of an old one. I like that the daily prize swap option is back, hopefully as a mainstay in future events as well.
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Negative feedback: The mini-game does not seem properly balanced, as the ability to buy tools is extremely limited/the cost is exorbitant based on the amount of coins we actually obtain through the event.
If the surprise box mechanic must stay (I really wish it wouldn't), please add a tool-tip/description of what is contained in the box (at a minimum, time-restricted to when it becomes usable at the start of the next event, if you don't want it visible prior to then); as it stands now, if you don't hunt down the information on the internet somewhere, you can't tell what is in the box - and that only works if you open the box before you have multiples waiting to be opened.
Alternatively; if you don't want people to know what is in a given surprise box until it is opened, fine . . . but at least apply a name/icon to each individual box that is indicative of the event during which it could first be opened.
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Middling feedback: Some people feel like they must horde game-play tokens in a given event until there is a good daily prize that they like (not me). That hampers them if they don't keep getting the free ticket refills to play the game as many times as possible throughout the event. I can see both sides of the argument for a ticket refill timer having a cap (i.e. you only get them free as long as there is room, and then too bad for you if you aren't using them), but I am reticent to accept that the desire to get people to play every day outweighs the ability to acquire all of the possible tickets.