Overall, very fun experience. I'm over 20 hours in and I'm already thinking about how I want to play in another play through.
(Many of the low reviews here are obviously by people who haven't played the game)
EDIT: I have now finished the game and can say this game is easily an 8/10. While graphically, there definitely can be improvements, the gameplay is fun, the story and characters are engaging, and the game runs smoothly. I encountered zero bugs or glitches while I played this game. Honestly, I would compare the graphics of this game to Fire Emblem: Three Houses -> flat yes, but do not take away enough from the gameplay experience to impact its rating more than subtracting one star.
There are valid criticisms of this game, but they are drowned out by the review bombing.