My problems stem from the fact that the show has no real direction. We are treated to a endless number of "Monster of the Day" episodes. In FwPC, we often had a showdown against an enemy general. Here, we don't get that. There really is nothing but MotD episodes. What about character development? That's practically non-existent. Nagisa and Honoka do not grow any at all. Nothing is added to them. In fact, throughout the series, they become flanderized to hilarious extremes. Shiny Luminous adds nothing either. She is a talking plot device.
As for the animation quality, it ranges from mediocre mid-2000's quality to just plain atrocious. In an early episode, a fight focusing on Shiny Luminous has it's animation quality slowly degrade, finally to the point where it looks like an acid trip.
Sadly, there isn't much more to say than the above. This is essentially MotD episodes repeated 45 times (not counting the first & last episode) with varying levels of animation quality that never gets better than mediocre. If you really like Nagisa and Honoka, pick a random episode, think of it as a side story, and you can probably have some fun. However, I do not recommend watching this from start to finish. You're better off just watching the first and last episode, pick a few random ones, and just watch some other PreCure shows.
