May Day and Museum Day were also included in updates, but I can't blame you for forgetting about them. May Day was a good idea that was blown by making it a one time one maze event. If you could visit a new maze each day with them getting more challenging each time and getting new rewards each time, it could have been a worthwhile update. Museum Day could have been interesting if they had designed it more like a scavenger hunt with things hidden in the exhibits, but just finding obvious stamp stands was boring. Wedding Day just seems like a half-hearted attempt to shoehorn Cyrus and Reese into the game now that Re-Tail is gone.
As far as I remember, all of the update content so far has either been returning content or one-off events with little replayability. A lot of the returning content is honestly in a worse form than in NL. Having Leif show up as a special visitor is worse than him having his own shop and Redd on a boat is just harder to get to and I don't remember him ever having all fake art in NL. I was honestly happier before that update when Gulliver, CJ, and Flick showed up more often. I was excited for Bunny Day until I actually got the update and found out the main feature was balloon spam. Also the annoying stuff that came with the updates like nerfing interest and bug spawn rates and removing hybrid islands.
So far all of the updates have come with unnecessary strings attached that make them less enjoyable than they should be. I have a feeling that the next update is going to have more bad surprises than good ones.
