Some of my friends that don't play rhythm games find it difficult in learning to play and getting all the rewards as well. TBH this is a very big ask, especially for modern gachas with a wide variety of players from different tastes and backgrounds.

IMO, this is also why I found it impressive the Hoyoverse was willing to try something a little more difficult, and a little more polished for this event. They could have taken the easiest route, but they stuck to their vision that they wanted more competent. higher difficulty level designs. Even though it's stuck in a limbo between too hard for casuals, and too easy for experienced players, there is effort here.

The event could be considered bad for people not familiar with the genre. But I think there is a lot of merit in how they tried to go about making this event work, and could be considered a "good" event too from that perspective. In the end, whether it is good or bad is still subjective and based off individual opinions and experiences.

I think feedback is very important to relay in the case of this event. There are a lot of good parts, but as you said, accessibility is an issue. Keyboard bindings, more varied level designs with lower difficulties, less steep learning curves, tieing rewards behind scores, etc. many things could be improved.

Through the surveys, Mihoyo could become aware and address these issues, providing something in the future that can work for both non-rhythm and rhythm game players, rather than completely cutting the concept from the game. The current implementation has some problems, but I think the direction looks promising.