I think this season was much better. The first few episodes were great; the setting of the entertainment industry was explored very well, besides a few oversimplifications, and I could really grasp the potential of Oshi no Ko. The pacing was good for the most part, and the production was decent. Also some of the drama was great.
That being said, the dialogue and most of the characters are not great. I think Akane is the only character of the main cast that I find believable and enjoyable to watch; the others are too cartoonish and annoying.
The plot isn't great neither, it is frequently dumb. In particular, I dislike how the characters act so competitive towards each other during the play, I don't think it's believable, nor does it make a good story. It appears like the show is trying to appeal to teenagers with cheap emotional bits, meanwhile throwing logic out of the window.
Overall, a good season from a mediocre series.