If you're a casual player, have you SEEN the aesthetics? The game looks fabulous and is just pure fun. Of course the majority loves it. Persona 5 is a pretty mediocre game in terms of strategy, and yet it's carried by its style into being one of most popular JRPGs. I quit Hi-Fi Rush after the main story, but I think it was worth the experience alone, and I felt like the bosses were spicing things up enough.

If you're a more into skill, of course that's there too. It's an "easy to play, hard to master" game like many others, and what I'd argue most games should be. The final boss kicked my ass, and I generally couldn't manage consistent S ranks in the later parts of the game. The game didn't grab me enough that I'd want to master the combos, timings and replay stages multiple times, but that's just me, I felt the same about Metal Gear Rising and still had a lot of fun as a casual player.

On the other hand, last year I spent some extra time in Shadow Generations and a lot more time in Spark the Electric Jester 3 to get higher ranks, despite the games being very simple, because memorising the stages and replaying them was just fun.