Don't get me wrong, I love this game and it's characters, the story it's absolutely interesting and has me hooked, but…
Negative aspects
The Gameplay is bad. It's a gacha and farming resources' problem, of course. Leveling cards up it's an absolute pain, and they don't really are exactly generous with this either. Then, in chapters like Ignihyde, they force you to have strong cards of very specific characters despite the difficulty of the battles. The farming in general it's boring and tedious despite being lessons on loop; events aren't free of this either. And, well, the gacha system used to be worse, at least they guarantee you the card now.
Positive aspects
Gameplay aside, everything else in the game is very polished. You can see Disney's high level of expertise and the care they have put into the characters, the art, the music and all the audiovisual aspects. While it is true that there are chapters that have been left behind because they were the earliest, there are events that make up for the lack of character content and show their development or interactions.