Eh, I thought it was perfect. I hate how modern Pokemon games have become quasi-MMORPGs, in staleness of core design, lack of combat depth and also their desire to have you spend every waking hour doing absolutely mindless rote activities.
This was nice. Strictly superior oldschool Pokemon clone with fantastically punny names, really cute characters and a nice runtime that's still longer than the old Pokemon games but not as bloated as modern ones.
Cassette Beasts is relatively short. You can beat the story in a couple of days. 100% and the DLC take longer, but it's an absolute pleasure all the way through. Highly recommend you move it to the top of the backlog.